diff --git a/applications/debug/ccid_test/ccid_test_app.c b/applications/debug/ccid_test/ccid_test_app.c
index 46a1237f9..abb8ad3dd 100644
--- a/applications/debug/ccid_test/ccid_test_app.c
+++ b/applications/debug/ccid_test/ccid_test_app.c
@@ -6,10 +6,13 @@
 #include <gui/view_dispatcher.h>
 #include <gui/modules/submenu.h>
 #include <gui/gui.h>
-#include "iso7816_callbacks.h"
-#include "iso7816_t0_apdu.h"
-#include "iso7816_atr.h"
-#include "iso7816_response.h"
+
+#include "iso7816/iso7816_handler.h"
+#include "iso7816/iso7816_t0_apdu.h"
+#include "iso7816/iso7816_atr.h"
+#include "iso7816/iso7816_response.h"
+
+#include "ccid_test_app_commands.h"
 
 typedef enum {
     EventTypeInput,
@@ -20,6 +23,7 @@ typedef struct {
     ViewPort* view_port;
     FuriMessageQueue* event_queue;
     FuriHalUsbCcidConfig ccid_cfg;
+    Iso7816Handler* iso7816_handler;
 } CcidTestApp;
 
 typedef struct {
@@ -63,6 +67,15 @@ uint32_t ccid_test_exit(void* context) {
 CcidTestApp* ccid_test_app_alloc(void) {
     CcidTestApp* app = malloc(sizeof(CcidTestApp));
 
+    //setup CCID USB
+    // On linux: set VID PID using: /usr/lib/pcsc/drivers/ifd-ccid.bundle/Contents/Info.plist
+    app->ccid_cfg.vid = 0x076B;
+    app->ccid_cfg.pid = 0x3A21;
+
+    app->iso7816_handler = iso7816_handler_alloc();
+    app->iso7816_handler->iso7816_answer_to_reset = iso7816_answer_to_reset;
+    app->iso7816_handler->iso7816_process_command = iso7816_process_command;
+
     // Gui
     app->gui = furi_record_open(RECORD_GUI);
 
@@ -92,174 +105,26 @@ void ccid_test_app_free(CcidTestApp* app) {
     furi_record_close(RECORD_GUI);
     app->gui = NULL;
 
+    free(app->iso7816_handler);
+
     // Free rest
     free(app);
 }
 
-void ccid_icc_power_on_callback(uint8_t* atrBuffer, uint32_t* atrlen, void* context) {
-    UNUSED(context);
-
-    iso7816_icc_power_on_callback(atrBuffer, atrlen);
-}
-
-void ccid_xfr_datablock_callback(
-    const uint8_t* pcToReaderDataBlock,
-    uint32_t pcToReaderDataBlockLen,
-    uint8_t* readerToPcDataBlock,
-    uint32_t* readerToPcDataBlockLen,
-    void* context) {
-    UNUSED(context);
-
-    iso7816_xfr_datablock_callback(
-        pcToReaderDataBlock, pcToReaderDataBlockLen, readerToPcDataBlock, readerToPcDataBlockLen);
-}
-
-static const CcidCallbacks ccid_cb = {
-    ccid_icc_power_on_callback,
-    ccid_xfr_datablock_callback,
-};
-
-//Instruction 1: returns an OK response unconditionally
-//APDU example: 0x01:0x01:0x00:0x00
-//response: SW1=0x90, SW2=0x00
-void handle_instruction_01(ISO7816_Response_APDU* responseAPDU) {
-    responseAPDU->DataLen = 0;
-    iso7816_set_response(responseAPDU, ISO7816_RESPONSE_OK);
-}
-
-//Instruction 2: expect command with no body, replies wit with a body with two bytes
-//APDU example: 0x01:0x02:0x00:0x00:0x02
-//response: 'bc' (0x62, 0x63) SW1=0x90, SW2=0x00
-void handle_instruction_02(
-    uint8_t p1,
-    uint8_t p2,
-    uint16_t lc,
-    uint16_t le,
-    ISO7816_Response_APDU* responseAPDU) {
-    if(p1 == 0 && p2 == 0 && lc == 0 && le >= 2) {
-        responseAPDU->Data[0] = 0x62;
-        responseAPDU->Data[1] = 0x63;
-
-        responseAPDU->DataLen = 2;
-
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_OK);
-    } else if(p1 != 0 || p2 != 0) {
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_WRONG_PARAMETERS_P1_P2);
-    } else {
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_WRONG_LENGTH);
-    }
-}
-
-//Instruction 3: sends a command with a body with two bytes, receives a response with no bytes
-//APDU example: 0x01:0x03:0x00:0x00:0x02:CA:FE
-//response SW1=0x90, SW2=0x00
-void handle_instruction_03(
-    uint8_t p1,
-    uint8_t p2,
-    uint16_t lc,
-    ISO7816_Response_APDU* responseAPDU) {
-    if(p1 == 0 && p2 == 0 && lc == 2) {
-        responseAPDU->DataLen = 0;
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_OK);
-    } else if(p1 != 0 || p2 != 0) {
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_WRONG_PARAMETERS_P1_P2);
-    } else {
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_WRONG_LENGTH);
-    }
-}
-
-//instruction 4: sends a command with a body with 'n' bytes, receives a response with 'n' bytes
-//APDU example: 0x01:0x04:0x00:0x00:0x04:0x01:0x02:0x03:0x04:0x04
-//receives (0x01, 0x02, 0x03, 0x04) SW1=0x90, SW2=0x00
-void handle_instruction_04(
-    uint8_t p1,
-    uint8_t p2,
-    uint16_t lc,
-    uint16_t le,
-    const uint8_t* commandApduDataBuffer,
-    ISO7816_Response_APDU* responseAPDU) {
-    if(p1 == 0 && p2 == 0 && lc > 0 && le > 0 && le >= lc) {
-        for(uint16_t i = 0; i < lc; i++) {
-            responseAPDU->Data[i] = commandApduDataBuffer[i];
-        }
-
-        responseAPDU->DataLen = lc;
-
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_OK);
-    } else if(p1 != 0 || p2 != 0) {
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_WRONG_PARAMETERS_P1_P2);
-    } else {
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_WRONG_LENGTH);
-    }
-}
-
-void iso7816_answer_to_reset(Iso7816Atr* atr) {
-    //minimum valid ATR: https://smartcard-atr.apdu.fr/parse?ATR=3B+00
-    atr->TS = 0x3B;
-    atr->T0 = 0x00;
-}
-
-void iso7816_process_command(
-    const ISO7816_Command_APDU* commandAPDU,
-    ISO7816_Response_APDU* responseAPDU) {
-    //example 1: sends a command with no body, receives a response with no body
-    //sends APDU 0x01:0x01:0x00:0x00
-    //receives SW1=0x90, SW2=0x00
-
-    if(commandAPDU->CLA == 0x01) {
-        switch(commandAPDU->INS) {
-        case 0x01:
-            handle_instruction_01(responseAPDU);
-            break;
-        case 0x02:
-            handle_instruction_02(
-                commandAPDU->P1, commandAPDU->P2, commandAPDU->Lc, commandAPDU->Le, responseAPDU);
-            break;
-        case 0x03:
-            handle_instruction_03(commandAPDU->P1, commandAPDU->P2, commandAPDU->Lc, responseAPDU);
-            break;
-        case 0x04:
-            handle_instruction_04(
-                commandAPDU->P1,
-                commandAPDU->P2,
-                commandAPDU->Lc,
-                commandAPDU->Le,
-                commandAPDU->Data,
-                responseAPDU);
-            break;
-        default:
-            iso7816_set_response(responseAPDU, ISO7816_RESPONSE_INSTRUCTION_NOT_SUPPORTED);
-        }
-    } else {
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_CLASS_NOT_SUPPORTED);
-    }
-}
-
-static const Iso7816Callbacks iso87816_cb = {
-    iso7816_answer_to_reset,
-    iso7816_process_command,
-};
-
 int32_t ccid_test_app(void* p) {
     UNUSED(p);
 
     //setup view
     CcidTestApp* app = ccid_test_app_alloc();
 
-    //setup CCID USB
-    // On linux: set VID PID using: /usr/lib/pcsc/drivers/ifd-ccid.bundle/Contents/Info.plist
-    app->ccid_cfg.vid = 0x076B;
-    app->ccid_cfg.pid = 0x3A21;
-
     FuriHalUsbInterface* usb_mode_prev = furi_hal_usb_get_config();
     furi_hal_usb_unlock();
 
     furi_check(furi_hal_usb_set_config(&usb_ccid, &app->ccid_cfg) == true);
-    furi_hal_usb_ccid_set_callbacks((CcidCallbacks*)&ccid_cb, NULL);
+    furi_hal_usb_ccid_set_callbacks(
+        (CcidCallbacks*)&app->iso7816_handler->ccid_callbacks, app->iso7816_handler);
     furi_hal_usb_ccid_insert_smartcard();
 
-    iso7816_set_callbacks((Iso7816Callbacks*)&iso87816_cb);
-
     //handle button events
     CcidTestAppEvent event;
     while(1) {
@@ -280,8 +145,6 @@ int32_t ccid_test_app(void* p) {
     furi_hal_usb_ccid_set_callbacks(NULL, NULL);
     furi_hal_usb_set_config(usb_mode_prev, NULL);
 
-    iso7816_set_callbacks(NULL);
-
     //teardown view
     ccid_test_app_free(app);
     return 0;
diff --git a/applications/debug/ccid_test/ccid_test_app_commands.c b/applications/debug/ccid_test/ccid_test_app_commands.c
new file mode 100644
index 000000000..1daaa70c3
--- /dev/null
+++ b/applications/debug/ccid_test/ccid_test_app_commands.c
@@ -0,0 +1,123 @@
+#include "iso7816/iso7816_t0_apdu.h"
+#include "iso7816/iso7816_response.h"
+
+//Instruction 1: returns an OK response unconditionally
+//APDU example: 0x01:0x01:0x00:0x00
+//response: SW1=0x90, SW2=0x00
+void handle_instruction_01(ISO7816_Response_APDU* response_apdu) {
+    response_apdu->DataLen = 0;
+    iso7816_set_response(response_apdu, ISO7816_RESPONSE_OK);
+}
+
+//Instruction 2: expect command with no body, replies wit with a body with two bytes
+//APDU example: 0x01:0x02:0x00:0x00:0x02
+//response: 'bc' (0x62, 0x63) SW1=0x90, SW2=0x00
+void handle_instruction_02(
+    uint8_t p1,
+    uint8_t p2,
+    uint16_t lc,
+    uint16_t le,
+    ISO7816_Response_APDU* response_apdu) {
+    if(p1 == 0 && p2 == 0 && lc == 0 && le >= 2) {
+        response_apdu->Data[0] = 0x62;
+        response_apdu->Data[1] = 0x63;
+
+        response_apdu->DataLen = 2;
+
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_OK);
+    } else if(p1 != 0 || p2 != 0) {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_WRONG_PARAMETERS_P1_P2);
+    } else {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_WRONG_LENGTH);
+    }
+}
+
+//Instruction 3: sends a command with a body with two bytes, receives a response with no bytes
+//APDU example: 0x01:0x03:0x00:0x00:0x02:CA:FE
+//response SW1=0x90, SW2=0x00
+void handle_instruction_03(
+    uint8_t p1,
+    uint8_t p2,
+    uint16_t lc,
+    ISO7816_Response_APDU* response_apdu) {
+    if(p1 == 0 && p2 == 0 && lc == 2) {
+        response_apdu->DataLen = 0;
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_OK);
+    } else if(p1 != 0 || p2 != 0) {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_WRONG_PARAMETERS_P1_P2);
+    } else {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_WRONG_LENGTH);
+    }
+}
+
+//instruction 4: sends a command with a body with 'n' bytes, receives a response with 'n' bytes
+//APDU example: 0x01:0x04:0x00:0x00:0x04:0x01:0x02:0x03:0x04:0x04
+//receives (0x01, 0x02, 0x03, 0x04) SW1=0x90, SW2=0x00
+void handle_instruction_04(
+    uint8_t p1,
+    uint8_t p2,
+    uint16_t lc,
+    uint16_t le,
+    const uint8_t* command_apdu_data_buffer,
+    ISO7816_Response_APDU* response_apdu) {
+    if(p1 == 0 && p2 == 0 && lc > 0 && le > 0 && le >= lc) {
+        for(uint16_t i = 0; i < lc; i++) {
+            response_apdu->Data[i] = command_apdu_data_buffer[i];
+        }
+
+        response_apdu->DataLen = lc;
+
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_OK);
+    } else if(p1 != 0 || p2 != 0) {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_WRONG_PARAMETERS_P1_P2);
+    } else {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_WRONG_LENGTH);
+    }
+}
+
+void iso7816_answer_to_reset(Iso7816Atr* atr) {
+    //minimum valid ATR: https://smartcard-atr.apdu.fr/parse?ATR=3B+00
+    atr->TS = 0x3B;
+    atr->T0 = 0x00;
+}
+
+void iso7816_process_command(
+    const ISO7816_Command_APDU* command_apdu,
+    ISO7816_Response_APDU* response_apdu) {
+    //example 1: sends a command with no body, receives a response with no body
+    //sends APDU 0x01:0x01:0x00:0x00
+    //receives SW1=0x90, SW2=0x00
+
+    if(command_apdu->CLA == 0x01) {
+        switch(command_apdu->INS) {
+        case 0x01:
+            handle_instruction_01(response_apdu);
+            break;
+        case 0x02:
+            handle_instruction_02(
+                command_apdu->P1,
+                command_apdu->P2,
+                command_apdu->Lc,
+                command_apdu->Le,
+                response_apdu);
+            break;
+        case 0x03:
+            handle_instruction_03(
+                command_apdu->P1, command_apdu->P2, command_apdu->Lc, response_apdu);
+            break;
+        case 0x04:
+            handle_instruction_04(
+                command_apdu->P1,
+                command_apdu->P2,
+                command_apdu->Lc,
+                command_apdu->Le,
+                command_apdu->Data,
+                response_apdu);
+            break;
+        default:
+            iso7816_set_response(response_apdu, ISO7816_RESPONSE_INSTRUCTION_NOT_SUPPORTED);
+        }
+    } else {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_CLASS_NOT_SUPPORTED);
+    }
+}
diff --git a/applications/debug/ccid_test/ccid_test_app_commands.h b/applications/debug/ccid_test/ccid_test_app_commands.h
new file mode 100644
index 000000000..ca3275aec
--- /dev/null
+++ b/applications/debug/ccid_test/ccid_test_app_commands.h
@@ -0,0 +1,7 @@
+#include "iso7816/iso7816_t0_apdu.h"
+
+void iso7816_answer_to_reset(Iso7816Atr* atr);
+
+void iso7816_process_command(
+    const ISO7816_Command_APDU* command_apdu,
+    ISO7816_Response_APDU* response_apdu);
diff --git a/applications/debug/ccid_test/iso7816_atr.h b/applications/debug/ccid_test/iso7816/iso7816_atr.h
similarity index 100%
rename from applications/debug/ccid_test/iso7816_atr.h
rename to applications/debug/ccid_test/iso7816/iso7816_atr.h
diff --git a/applications/debug/ccid_test/iso7816/iso7816_handler.c b/applications/debug/ccid_test/iso7816/iso7816_handler.c
new file mode 100644
index 000000000..97214d1b2
--- /dev/null
+++ b/applications/debug/ccid_test/iso7816/iso7816_handler.c
@@ -0,0 +1,68 @@
+// transforms low level calls such as XFRCallback or ICC Power on to a structured one
+// an application can register these calls and listen for the callbacks defined in Iso7816Callbacks
+
+#include <stdint.h>
+#include <stddef.h>
+#include <furi.h>
+#include <furi_hal.h>
+
+#include "iso7816_t0_apdu.h"
+#include "iso7816_atr.h"
+#include "iso7816_handler.h"
+#include "iso7816_response.h"
+
+void iso7816_icc_power_on_callback(uint8_t* atr_data, uint32_t* atr_data_len, void* context) {
+    furi_check(context);
+
+    Iso7816Handler* handler = (Iso7816Handler*)context;
+
+    Iso7816Atr iso7816_atr;
+    handler->iso7816_answer_to_reset(&iso7816_atr);
+
+    furi_assert(iso7816_atr.T0 == 0x00);
+
+    uint8_t atr_buffer[2] = {iso7816_atr.TS, iso7816_atr.T0};
+
+    *atr_data_len = 2;
+
+    memcpy(atr_data, atr_buffer, sizeof(uint8_t) * (*atr_data_len));
+}
+
+//dataBlock points to the buffer
+//dataBlockLen tells reader how nany bytes should be read
+void iso7816_xfr_datablock_callback(
+    const uint8_t* pc_to_reader_datablock,
+    uint32_t pc_to_reader_datablock_len,
+    uint8_t* reader_to_pc_datablock,
+    uint32_t* reader_to_pc_datablock_len,
+    void* context) {
+    furi_check(context);
+
+    Iso7816Handler* handler = (Iso7816Handler*)context;
+
+    ISO7816_Response_APDU* response_apdu = (ISO7816_Response_APDU*)&handler->response_apdu_buffer;
+
+    ISO7816_Command_APDU* command_apdu = (ISO7816_Command_APDU*)&handler->command_apdu_buffer;
+
+    uint8_t result = iso7816_read_command_apdu(
+        command_apdu, pc_to_reader_datablock, pc_to_reader_datablock_len);
+
+    if(result == ISO7816_READ_COMMAND_APDU_OK) {
+        handler->iso7816_process_command(command_apdu, response_apdu);
+
+        furi_assert(response_apdu->DataLen < CCID_SHORT_APDU_SIZE);
+    } else if(result == ISO7816_READ_COMMAND_APDU_ERROR_WRONG_LE) {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_WRONG_LE);
+    } else if(result == ISO7816_READ_COMMAND_APDU_ERROR_WRONG_LENGTH) {
+        iso7816_set_response(response_apdu, ISO7816_RESPONSE_WRONG_LENGTH);
+    }
+
+    iso7816_write_response_apdu(response_apdu, reader_to_pc_datablock, reader_to_pc_datablock_len);
+}
+
+Iso7816Handler* iso7816_handler_alloc() {
+    Iso7816Handler* handler = malloc(sizeof(Iso7816Handler));
+    handler->ccid_callbacks.icc_power_on_callback = iso7816_icc_power_on_callback;
+    handler->ccid_callbacks.xfr_datablock_callback = iso7816_xfr_datablock_callback;
+    return handler;
+}
diff --git a/applications/debug/ccid_test/iso7816/iso7816_handler.h b/applications/debug/ccid_test/iso7816/iso7816_handler.h
new file mode 100644
index 000000000..d67118ce6
--- /dev/null
+++ b/applications/debug/ccid_test/iso7816/iso7816_handler.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stdint.h>
+#include "iso7816_atr.h"
+#include "iso7816_t0_apdu.h"
+
+typedef struct {
+    CcidCallbacks ccid_callbacks;
+    void (*iso7816_answer_to_reset)(Iso7816Atr* atr);
+    void (*iso7816_process_command)(
+        const ISO7816_Command_APDU* command,
+        ISO7816_Response_APDU* response);
+
+    uint8_t command_apdu_buffer[sizeof(ISO7816_Command_APDU) + CCID_SHORT_APDU_SIZE];
+    uint8_t response_apdu_buffer[sizeof(ISO7816_Response_APDU) + CCID_SHORT_APDU_SIZE];
+} Iso7816Handler;
+
+Iso7816Handler* iso7816_handler_alloc();
diff --git a/applications/debug/ccid_test/iso7816_response.c b/applications/debug/ccid_test/iso7816/iso7816_response.c
similarity index 100%
rename from applications/debug/ccid_test/iso7816_response.c
rename to applications/debug/ccid_test/iso7816/iso7816_response.c
diff --git a/applications/debug/ccid_test/iso7816_response.h b/applications/debug/ccid_test/iso7816/iso7816_response.h
similarity index 100%
rename from applications/debug/ccid_test/iso7816_response.h
rename to applications/debug/ccid_test/iso7816/iso7816_response.h
diff --git a/applications/debug/ccid_test/iso7816_t0_apdu.c b/applications/debug/ccid_test/iso7816/iso7816_t0_apdu.c
similarity index 85%
rename from applications/debug/ccid_test/iso7816_t0_apdu.c
rename to applications/debug/ccid_test/iso7816/iso7816_t0_apdu.c
index 3de5555f4..216f2582f 100644
--- a/applications/debug/ccid_test/iso7816_t0_apdu.c
+++ b/applications/debug/ccid_test/iso7816/iso7816_t0_apdu.c
@@ -61,24 +61,25 @@ uint8_t iso7816_read_command_apdu(
 //data buffer contains the whole APU response (response + trailer (SW1+SW2))
 void iso7816_write_response_apdu(
     const ISO7816_Response_APDU* response,
-    uint8_t* readerToPcDataBlock,
-    uint32_t* readerToPcDataBlockLen) {
+    uint8_t* reader_to_pc_datablock,
+    uint32_t* reader_to_pc_datablock_len) {
     uint32_t responseDataBufferIndex = 0;
 
     //response body
     if(response->DataLen > 0) {
         while(responseDataBufferIndex < response->DataLen) {
-            readerToPcDataBlock[responseDataBufferIndex] = response->Data[responseDataBufferIndex];
+            reader_to_pc_datablock[responseDataBufferIndex] =
+                response->Data[responseDataBufferIndex];
             responseDataBufferIndex++;
         }
     }
 
     //trailer
-    readerToPcDataBlock[responseDataBufferIndex] = response->SW1;
+    reader_to_pc_datablock[responseDataBufferIndex] = response->SW1;
     responseDataBufferIndex++;
 
-    readerToPcDataBlock[responseDataBufferIndex] = response->SW2;
+    reader_to_pc_datablock[responseDataBufferIndex] = response->SW2;
     responseDataBufferIndex++;
 
-    *readerToPcDataBlockLen = responseDataBufferIndex;
+    *reader_to_pc_datablock_len = responseDataBufferIndex;
 }
diff --git a/applications/debug/ccid_test/iso7816_t0_apdu.h b/applications/debug/ccid_test/iso7816/iso7816_t0_apdu.h
similarity index 81%
rename from applications/debug/ccid_test/iso7816_t0_apdu.h
rename to applications/debug/ccid_test/iso7816/iso7816_t0_apdu.h
index 50eb476a9..a21dfbafc 100644
--- a/applications/debug/ccid_test/iso7816_t0_apdu.h
+++ b/applications/debug/ccid_test/iso7816/iso7816_t0_apdu.h
@@ -31,12 +31,11 @@ typedef struct {
     uint8_t Data[0];
 } FURI_PACKED ISO7816_Response_APDU;
 
-void iso7816_answer_to_reset(Iso7816Atr* atr);
 uint8_t iso7816_read_command_apdu(
     ISO7816_Command_APDU* command,
-    const uint8_t* pcToReaderDataBlock,
-    uint32_t pcToReaderDataBlockLen);
+    const uint8_t* pc_to_reader_datablock,
+    uint32_t pc_to_reader_datablock_len);
 void iso7816_write_response_apdu(
     const ISO7816_Response_APDU* response,
-    uint8_t* readerToPcDataBlock,
-    uint32_t* readerToPcDataBlockLen);
+    uint8_t* reader_to_pc_datablock,
+    uint32_t* reader_to_pc_datablock_len);
diff --git a/applications/debug/ccid_test/iso7816_callbacks.c b/applications/debug/ccid_test/iso7816_callbacks.c
deleted file mode 100644
index 6c1bb106a..000000000
--- a/applications/debug/ccid_test/iso7816_callbacks.c
+++ /dev/null
@@ -1,65 +0,0 @@
-// transforms low level calls such as XFRCallback or ICC Power on to a structured one
-// an application can register these calls and listen for the callbacks defined in Iso7816Callbacks
-
-#include <stdint.h>
-#include <stddef.h>
-#include <furi.h>
-#include <furi_hal.h>
-
-#include "iso7816_t0_apdu.h"
-#include "iso7816_atr.h"
-#include "iso7816_callbacks.h"
-#include "iso7816_response.h"
-
-static Iso7816Callbacks* callbacks = NULL;
-
-static uint8_t commandApduBuffer[sizeof(ISO7816_Command_APDU) + CCID_SHORT_APDU_SIZE];
-static uint8_t responseApduBuffer[sizeof(ISO7816_Response_APDU) + CCID_SHORT_APDU_SIZE];
-
-void iso7816_set_callbacks(Iso7816Callbacks* cb) {
-    callbacks = cb;
-}
-
-void iso7816_icc_power_on_callback(uint8_t* atrBuffer, uint32_t* atrlen) {
-    Iso7816Atr atr;
-    callbacks->iso7816_answer_to_reset(&atr);
-
-    furi_assert(atr.T0 == 0x00);
-
-    uint8_t AtrBuffer[2] = {atr.TS, atr.T0};
-
-    *atrlen = 2;
-
-    memcpy(atrBuffer, AtrBuffer, sizeof(uint8_t) * (*atrlen));
-}
-
-//dataBlock points to the buffer
-//dataBlockLen tells reader how nany bytes should be read
-void iso7816_xfr_datablock_callback(
-    const uint8_t* pcToReaderDataBlock,
-    uint32_t pcToReaderDataBlockLen,
-    uint8_t* readerToPcDataBlock,
-    uint32_t* readerToPcDataBlockLen) {
-    ISO7816_Response_APDU* responseAPDU = (ISO7816_Response_APDU*)&responseApduBuffer;
-
-    if(callbacks != NULL) {
-        ISO7816_Command_APDU* commandAPDU = (ISO7816_Command_APDU*)&commandApduBuffer;
-
-        uint8_t result =
-            iso7816_read_command_apdu(commandAPDU, pcToReaderDataBlock, pcToReaderDataBlockLen);
-
-        if(result == ISO7816_READ_COMMAND_APDU_OK) {
-            callbacks->iso7816_process_command(commandAPDU, responseAPDU);
-
-            furi_assert(responseAPDU->DataLen < CCID_SHORT_APDU_SIZE);
-        } else if(result == ISO7816_READ_COMMAND_APDU_ERROR_WRONG_LE) {
-            iso7816_set_response(responseAPDU, ISO7816_RESPONSE_WRONG_LE);
-        } else if(result == ISO7816_READ_COMMAND_APDU_ERROR_WRONG_LENGTH) {
-            iso7816_set_response(responseAPDU, ISO7816_RESPONSE_WRONG_LENGTH);
-        }
-    } else {
-        iso7816_set_response(responseAPDU, ISO7816_RESPONSE_INTERNAL_EXCEPTION);
-    }
-
-    iso7816_write_response_apdu(responseAPDU, readerToPcDataBlock, readerToPcDataBlockLen);
-}
diff --git a/applications/debug/ccid_test/iso7816_callbacks.h b/applications/debug/ccid_test/iso7816_callbacks.h
deleted file mode 100644
index 6b408c7f5..000000000
--- a/applications/debug/ccid_test/iso7816_callbacks.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#pragma once
-
-#include <stdint.h>
-#include "iso7816_atr.h"
-#include "iso7816_t0_apdu.h"
-
-typedef struct {
-    void (*iso7816_answer_to_reset)(Iso7816Atr* atr);
-    void (*iso7816_process_command)(
-        const ISO7816_Command_APDU* command,
-        ISO7816_Response_APDU* response);
-} Iso7816Callbacks;
-
-void iso7816_set_callbacks(Iso7816Callbacks* cb);
-
-void iso7816_icc_power_on_callback(uint8_t* atrBuffer, uint32_t* atrlen);
-void iso7816_xfr_datablock_callback(
-    const uint8_t* dataBlock,
-    uint32_t dataBlockLen,
-    uint8_t* responseDataBlock,
-    uint32_t* responseDataBlockLen);
diff --git a/applications/main/nfc/helpers/nfc_detected_protocols.c b/applications/main/nfc/helpers/nfc_detected_protocols.c
new file mode 100644
index 000000000..339d4ddc2
--- /dev/null
+++ b/applications/main/nfc/helpers/nfc_detected_protocols.c
@@ -0,0 +1,85 @@
+#include "nfc_detected_protocols.h"
+
+#include <furi.h>
+
+struct NfcDetectedProtocols {
+    uint32_t protocols_detected_num;
+    NfcProtocol protocols_detected[NfcProtocolNum];
+    uint32_t selected_idx;
+};
+
+NfcDetectedProtocols* nfc_detected_protocols_alloc(void) {
+    NfcDetectedProtocols* instance = malloc(sizeof(NfcDetectedProtocols));
+
+    instance->protocols_detected_num = 0;
+    instance->selected_idx = 0;
+
+    return instance;
+}
+
+void nfc_detected_protocols_free(NfcDetectedProtocols* instance) {
+    furi_assert(instance);
+
+    free(instance);
+}
+
+void nfc_detected_protocols_reset(NfcDetectedProtocols* instance) {
+    furi_assert(instance);
+
+    instance->protocols_detected_num = 0;
+    memset(instance->protocols_detected, 0, sizeof(instance->protocols_detected));
+    instance->selected_idx = 0;
+}
+
+void nfc_detected_protocols_select(NfcDetectedProtocols* instance, uint32_t idx) {
+    furi_assert(instance);
+
+    instance->selected_idx = idx;
+}
+
+void nfc_detected_protocols_set(
+    NfcDetectedProtocols* instance,
+    const NfcProtocol* types,
+    uint32_t count) {
+    furi_assert(instance);
+    furi_assert(types);
+    furi_assert(count < NfcProtocolNum);
+
+    memcpy(instance->protocols_detected, types, count);
+    instance->protocols_detected_num = count;
+    instance->selected_idx = 0;
+}
+
+uint32_t nfc_detected_protocols_get_num(NfcDetectedProtocols* instance) {
+    furi_assert(instance);
+
+    return instance->protocols_detected_num;
+}
+
+NfcProtocol nfc_detected_protocols_get_protocol(NfcDetectedProtocols* instance, uint32_t idx) {
+    furi_assert(instance);
+    furi_assert(idx < instance->protocols_detected_num);
+
+    return instance->protocols_detected[idx];
+}
+
+void nfc_detected_protocols_fill_all_protocols(NfcDetectedProtocols* instance) {
+    furi_assert(instance);
+
+    instance->protocols_detected_num = NfcProtocolNum;
+    for(uint32_t i = 0; i < NfcProtocolNum; i++) {
+        instance->protocols_detected[i] = i;
+    }
+}
+
+NfcProtocol nfc_detected_protocols_get_selected(NfcDetectedProtocols* instance) {
+    furi_assert(instance);
+
+    return instance->protocols_detected[instance->selected_idx];
+}
+
+uint32_t nfc_detected_protocols_get_selected_idx(NfcDetectedProtocols* instance) {
+    furi_assert(instance);
+
+    return instance->selected_idx;
+}
diff --git a/applications/main/nfc/helpers/nfc_detected_protocols.h b/applications/main/nfc/helpers/nfc_detected_protocols.h
new file mode 100644
index 000000000..2ab46add3
--- /dev/null
+++ b/applications/main/nfc/helpers/nfc_detected_protocols.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <stdint.h>
+#include <nfc/protocols/nfc_protocol.h>
+
+typedef struct NfcDetectedProtocols NfcDetectedProtocols;
+
+NfcDetectedProtocols* nfc_detected_protocols_alloc(void);
+
+void nfc_detected_protocols_free(NfcDetectedProtocols* instance);
+
+void nfc_detected_protocols_reset(NfcDetectedProtocols* instance);
+
+void nfc_detected_protocols_select(NfcDetectedProtocols* instance, uint32_t idx);
+
+void nfc_detected_protocols_set(
+    NfcDetectedProtocols* instance,
+    const NfcProtocol* types,
+    uint32_t count);
+
+uint32_t nfc_detected_protocols_get_num(NfcDetectedProtocols* instance);
+
+NfcProtocol nfc_detected_protocols_get_protocol(NfcDetectedProtocols* instance, uint32_t idx);
+
+void nfc_detected_protocols_fill_all_protocols(NfcDetectedProtocols* instance);
+
+NfcProtocol nfc_detected_protocols_get_selected(NfcDetectedProtocols* instance);
+
+uint32_t nfc_detected_protocols_get_selected_idx(NfcDetectedProtocols* instance);
diff --git a/applications/main/nfc/helpers/protocol_support/nfc_protocol_support.c b/applications/main/nfc/helpers/protocol_support/nfc_protocol_support.c
index 063e0ece3..c56b55390 100644
--- a/applications/main/nfc/helpers/protocol_support/nfc_protocol_support.c
+++ b/applications/main/nfc/helpers/protocol_support/nfc_protocol_support.c
@@ -150,8 +150,7 @@ static void nfc_protocol_support_scene_read_on_enter(NfcApp* instance) {
 
     view_dispatcher_switch_to_view(instance->view_dispatcher, NfcViewPopup);
 
-    const NfcProtocol protocol =
-        instance->protocols_detected[instance->protocols_detected_selected_idx];
+    const NfcProtocol protocol = nfc_detected_protocols_get_selected(instance->detected_protocols);
     instance->poller = nfc_poller_alloc(instance->nfc, protocol);
 
     view_dispatcher_switch_to_view(instance->view_dispatcher, NfcViewPopup);
@@ -186,7 +185,7 @@ static bool nfc_protocol_support_scene_read_on_event(NfcApp* instance, SceneMana
                 consumed = true;
             } else {
                 const NfcProtocol protocol =
-                    instance->protocols_detected[instance->protocols_detected_selected_idx];
+                    nfc_detected_protocols_get_selected(instance->detected_protocols);
                 consumed = nfc_protocol_support[protocol]->scene_read.on_event(instance, event);
             }
         } else if(event.event == NfcCustomEventPollerFailure) {
@@ -199,7 +198,7 @@ static bool nfc_protocol_support_scene_read_on_event(NfcApp* instance, SceneMana
             consumed = true;
         } else if(event.event == NfcCustomEventCardDetected) {
             const NfcProtocol protocol =
-                instance->protocols_detected[instance->protocols_detected_selected_idx];
+                nfc_detected_protocols_get_selected(instance->detected_protocols);
             consumed = nfc_protocol_support[protocol]->scene_read.on_event(instance, event);
         }
     } else if(event.type == SceneManagerEventTypeBack) {
diff --git a/applications/main/nfc/nfc_app.c b/applications/main/nfc/nfc_app.c
index ce444982d..68b5d0c6f 100644
--- a/applications/main/nfc/nfc_app.c
+++ b/applications/main/nfc/nfc_app.c
@@ -50,6 +50,7 @@ NfcApp* nfc_app_alloc(void) {
 
     instance->nfc = nfc_alloc();
 
+    instance->detected_protocols = nfc_detected_protocols_alloc();
     instance->felica_auth = felica_auth_alloc();
     instance->mf_ul_auth = mf_ultralight_auth_alloc();
     instance->slix_unlock = slix_unlock_alloc();
@@ -142,6 +143,7 @@ void nfc_app_free(NfcApp* instance) {
 
     nfc_free(instance->nfc);
 
+    nfc_detected_protocols_free(instance->detected_protocols);
     felica_auth_free(instance->felica_auth);
     mf_ultralight_auth_free(instance->mf_ul_auth);
     slix_unlock_free(instance->slix_unlock);
@@ -433,23 +435,6 @@ void nfc_show_loading_popup(void* context, bool show) {
     }
 }
 
-void nfc_app_set_detected_protocols(NfcApp* instance, const NfcProtocol* types, uint32_t count) {
-    furi_assert(instance);
-    furi_assert(types);
-    furi_assert(count < NfcProtocolNum);
-
-    memcpy(instance->protocols_detected, types, count);
-    instance->protocols_detected_num = count;
-    instance->protocols_detected_selected_idx = 0;
-}
-
-void nfc_app_reset_detected_protocols(NfcApp* instance) {
-    furi_assert(instance);
-
-    instance->protocols_detected_selected_idx = 0;
-    instance->protocols_detected_num = 0;
-}
-
 void nfc_append_filename_string_when_present(NfcApp* instance, FuriString* string) {
     furi_assert(instance);
     furi_assert(string);
diff --git a/applications/main/nfc/nfc_app_i.h b/applications/main/nfc/nfc_app_i.h
index 9a9c81004..867d0eb4f 100644
--- a/applications/main/nfc/nfc_app_i.h
+++ b/applications/main/nfc/nfc_app_i.h
@@ -26,6 +26,7 @@
 #include "views/dict_attack.h"
 
 #include <nfc/scenes/nfc_scene.h>
+#include "helpers/nfc_detected_protocols.h"
 #include "helpers/nfc_custom_event.h"
 #include "helpers/mf_ultralight_auth.h"
 #include "helpers/mf_user_dict.h"
@@ -107,9 +108,7 @@ struct NfcApp {
     FuriString* text_box_store;
     uint8_t byte_input_store[NFC_BYTE_INPUT_STORE_SIZE];
 
-    uint32_t protocols_detected_num;
-    NfcProtocol protocols_detected[NfcProtocolNum];
-    uint32_t protocols_detected_selected_idx;
+    NfcDetectedProtocols* detected_protocols;
 
     RpcAppSystem* rpc_ctx;
     NfcRpcState rpc_state;
@@ -194,8 +193,4 @@ bool nfc_save_file(NfcApp* instance, FuriString* path);
 
 void nfc_make_app_folder(NfcApp* instance);
 
-void nfc_app_set_detected_protocols(NfcApp* instance, const NfcProtocol* types, uint32_t count);
-
-void nfc_app_reset_detected_protocols(NfcApp* instance);
-
 void nfc_append_filename_string_when_present(NfcApp* instance, FuriString* string);
diff --git a/applications/main/nfc/plugins/supported_cards/plantain.c b/applications/main/nfc/plugins/supported_cards/plantain.c
index 11b60d6fa..36f745697 100644
--- a/applications/main/nfc/plugins/supported_cards/plantain.c
+++ b/applications/main/nfc/plugins/supported_cards/plantain.c
@@ -229,7 +229,7 @@ static bool plantain_parse(const NfcDevice* device, FuriString* parsed_data) {
         }
 
         furi_string_printf(
-            parsed_data, "\e#Plantain\nNo.: %llu?\nBalance:%lu\n", card_number, balance);
+            parsed_data, "\e#Plantain\nNo.: %lluX\nBalance: %lu\n", card_number, balance);
         parsed = true;
     } while(false);
 
diff --git a/applications/main/nfc/plugins/supported_cards/two_cities.c b/applications/main/nfc/plugins/supported_cards/two_cities.c
index 2f92030d9..dc87d3072 100644
--- a/applications/main/nfc/plugins/supported_cards/two_cities.c
+++ b/applications/main/nfc/plugins/supported_cards/two_cities.c
@@ -157,7 +157,7 @@ static bool two_cities_parse(const NfcDevice* device, FuriString* parsed_data) {
 
         furi_string_printf(
             parsed_data,
-            "\e#Troika+Plantain\nPN: %llu?\nPB: %lu rur.\nTN: %lu\nTB: %u rur.\n",
+            "\e#Troika+Plantain\nPN: %lluX\nPB: %lu rur.\nTN: %lu\nTB: %u rur.\n",
             card_number,
             balance,
             troika_number,
diff --git a/applications/main/nfc/scenes/nfc_scene_detect.c b/applications/main/nfc/scenes/nfc_scene_detect.c
index 3ef153657..7ef3f9d87 100644
--- a/applications/main/nfc/scenes/nfc_scene_detect.c
+++ b/applications/main/nfc/scenes/nfc_scene_detect.c
@@ -7,7 +7,8 @@ void nfc_scene_detect_scan_callback(NfcScannerEvent event, void* context) {
     NfcApp* instance = context;
 
     if(event.type == NfcScannerEventTypeDetected) {
-        nfc_app_set_detected_protocols(instance, event.data.protocols, event.data.protocol_num);
+        nfc_detected_protocols_set(
+            instance->detected_protocols, event.data.protocols, event.data.protocol_num);
         view_dispatcher_send_custom_event(instance->view_dispatcher, NfcCustomEventWorkerExit);
     }
 }
@@ -23,7 +24,7 @@ void nfc_scene_detect_on_enter(void* context) {
     popup_set_icon(instance->popup, 0, 8, &I_NFC_manual_60x50);
     view_dispatcher_switch_to_view(instance->view_dispatcher, NfcViewPopup);
 
-    nfc_app_reset_detected_protocols(instance);
+    nfc_detected_protocols_reset(instance->detected_protocols);
 
     instance->scanner = nfc_scanner_alloc(instance->nfc);
     nfc_scanner_start(instance->scanner, nfc_scene_detect_scan_callback, instance);
@@ -37,7 +38,7 @@ bool nfc_scene_detect_on_event(void* context, SceneManagerEvent event) {
 
     if(event.type == SceneManagerEventTypeCustom) {
         if(event.event == NfcCustomEventWorkerExit) {
-            if(instance->protocols_detected_num > 1) {
+            if(nfc_detected_protocols_get_num(instance->detected_protocols) > 1) {
                 notification_message(instance->notifications, &sequence_single_vibro);
                 scene_manager_next_scene(instance->scene_manager, NfcSceneSelectProtocol);
             } else {
diff --git a/applications/main/nfc/scenes/nfc_scene_mf_ultralight_unlock_warn.c b/applications/main/nfc/scenes/nfc_scene_mf_ultralight_unlock_warn.c
index 4df8a6289..a0b6986d1 100644
--- a/applications/main/nfc/scenes/nfc_scene_mf_ultralight_unlock_warn.c
+++ b/applications/main/nfc/scenes/nfc_scene_mf_ultralight_unlock_warn.c
@@ -57,7 +57,8 @@ bool nfc_scene_mf_ultralight_unlock_warn_on_event(void* context, SceneManagerEve
         if(event.type == SceneManagerEventTypeCustom) {
             if(event.event == DialogExResultRight) {
                 const NfcProtocol mfu_protocol[] = {NfcProtocolMfUltralight};
-                nfc_app_set_detected_protocols(nfc, mfu_protocol, COUNT_OF(mfu_protocol));
+                nfc_detected_protocols_set(
+                    nfc->detected_protocols, mfu_protocol, COUNT_OF(mfu_protocol));
                 scene_manager_next_scene(nfc->scene_manager, NfcSceneRead);
                 dolphin_deed(DolphinDeedNfcRead);
                 consumed = true;
@@ -77,7 +78,8 @@ bool nfc_scene_mf_ultralight_unlock_warn_on_event(void* context, SceneManagerEve
         if(event.type == SceneManagerEventTypeCustom) {
             if(event.event == DialogExResultCenter) {
                 const NfcProtocol mfu_protocol[] = {NfcProtocolMfUltralight};
-                nfc_app_set_detected_protocols(nfc, mfu_protocol, COUNT_OF(mfu_protocol));
+                nfc_detected_protocols_set(
+                    nfc->detected_protocols, mfu_protocol, COUNT_OF(mfu_protocol));
                 scene_manager_next_scene(nfc->scene_manager, NfcSceneRead);
                 dolphin_deed(DolphinDeedNfcRead);
                 consumed = true;
diff --git a/applications/main/nfc/scenes/nfc_scene_select_protocol.c b/applications/main/nfc/scenes/nfc_scene_select_protocol.c
index af644035e..f2c92b631 100644
--- a/applications/main/nfc/scenes/nfc_scene_select_protocol.c
+++ b/applications/main/nfc/scenes/nfc_scene_select_protocol.c
@@ -14,21 +14,19 @@ void nfc_scene_select_protocol_on_enter(void* context) {
     const char* prefix;
     if(scene_manager_has_previous_scene(instance->scene_manager, NfcSceneExtraActions)) {
         prefix = "Read";
-        instance->protocols_detected_num = NfcProtocolNum;
-        for(uint32_t i = 0; i < NfcProtocolNum; i++) {
-            instance->protocols_detected[i] = i;
-        }
+        nfc_detected_protocols_fill_all_protocols(instance->detected_protocols);
     } else {
         prefix = "Read as";
         submenu_set_header(submenu, "Multi-protocol card");
     }
 
-    for(uint32_t i = 0; i < instance->protocols_detected_num; i++) {
+    for(uint32_t i = 0; i < nfc_detected_protocols_get_num(instance->detected_protocols); i++) {
         furi_string_printf(
             temp_str,
             "%s %s",
             prefix,
-            nfc_device_get_protocol_name(instance->protocols_detected[i]));
+            nfc_device_get_protocol_name(
+                nfc_detected_protocols_get_protocol(instance->detected_protocols, i)));
 
         furi_string_replace_str(temp_str, "Mifare", "MIFARE");
         submenu_add_item(
@@ -40,9 +38,8 @@ void nfc_scene_select_protocol_on_enter(void* context) {
     }
     furi_string_free(temp_str);
 
-    const uint32_t state =
-        scene_manager_get_scene_state(instance->scene_manager, NfcSceneSelectProtocol);
-    submenu_set_selected_item(submenu, state);
+    submenu_set_selected_item(
+        submenu, nfc_detected_protocols_get_selected_idx(instance->detected_protocols));
 
     view_dispatcher_switch_to_view(instance->view_dispatcher, NfcViewMenu);
 }
@@ -52,10 +49,8 @@ bool nfc_scene_select_protocol_on_event(void* context, SceneManagerEvent event)
     bool consumed = false;
 
     if(event.type == SceneManagerEventTypeCustom) {
-        instance->protocols_detected_selected_idx = event.event;
+        nfc_detected_protocols_select(instance->detected_protocols, event.event);
         scene_manager_next_scene(instance->scene_manager, NfcSceneRead);
-        scene_manager_set_scene_state(
-            instance->scene_manager, NfcSceneSelectProtocol, event.event);
         consumed = true;
     } else if(event.type == SceneManagerEventTypeBack) {
         if(scene_manager_has_previous_scene(instance->scene_manager, NfcSceneDetect)) {
diff --git a/applications/main/nfc/scenes/nfc_scene_start.c b/applications/main/nfc/scenes/nfc_scene_start.c
index e8774b4aa..53857b849 100644
--- a/applications/main/nfc/scenes/nfc_scene_start.c
+++ b/applications/main/nfc/scenes/nfc_scene_start.c
@@ -25,7 +25,7 @@ void nfc_scene_start_on_enter(void* context) {
     nfc_device_clear(nfc->nfc_device);
     iso14443_3a_reset(nfc->iso14443_3a_edit_data);
     // Reset detected protocols list
-    nfc_app_reset_detected_protocols(nfc);
+    nfc_detected_protocols_reset(nfc->detected_protocols);
 
     submenu_add_item(submenu, "Read", SubmenuIndexRead, nfc_scene_start_submenu_callback, nfc);
     submenu_add_item(
diff --git a/documentation/file_formats/LfRfidFileFormat.md b/documentation/file_formats/LfRfidFileFormat.md
index 2463195e4..6bad4a3c0 100644
--- a/documentation/file_formats/LfRfidFileFormat.md
+++ b/documentation/file_formats/LfRfidFileFormat.md
@@ -47,3 +47,4 @@ The file stores a single RFID key of the type defined by the `Key type` paramete
 | PAC/Stanley | PAC/Stanley       |
 | Keri        | Keri              |
 | Gallagher   | Gallagher         |
+| GProxII     | Guardall GProx II |
diff --git a/lib/lfrfid/protocols/lfrfid_protocols.c b/lib/lfrfid/protocols/lfrfid_protocols.c
index e8d630668..0e65dc045 100644
--- a/lib/lfrfid/protocols/lfrfid_protocols.c
+++ b/lib/lfrfid/protocols/lfrfid_protocols.c
@@ -19,6 +19,7 @@
 #include "protocol_gallagher.h"
 #include "protocol_nexwatch.h"
 #include "protocol_securakey.h"
+#include "protocol_gproxii.h"
 
 const ProtocolBase* lfrfid_protocols[] = {
     [LFRFIDProtocolEM4100] = &protocol_em4100,
@@ -43,4 +44,5 @@ const ProtocolBase* lfrfid_protocols[] = {
     [LFRFIDProtocolGallagher] = &protocol_gallagher,
     [LFRFIDProtocolNexwatch] = &protocol_nexwatch,
     [LFRFIDProtocolSecurakey] = &protocol_securakey,
+    [LFRFIDProtocolGProxII] = &protocol_gproxii,
 };
diff --git a/lib/lfrfid/protocols/lfrfid_protocols.h b/lib/lfrfid/protocols/lfrfid_protocols.h
index b9ef5c518..12ac2dddd 100644
--- a/lib/lfrfid/protocols/lfrfid_protocols.h
+++ b/lib/lfrfid/protocols/lfrfid_protocols.h
@@ -30,6 +30,7 @@ typedef enum {
     LFRFIDProtocolGallagher,
     LFRFIDProtocolNexwatch,
     LFRFIDProtocolSecurakey,
+    LFRFIDProtocolGProxII,
     LFRFIDProtocolMax,
 } LFRFIDProtocol;
 
diff --git a/lib/lfrfid/protocols/protocol_gproxii.c b/lib/lfrfid/protocols/protocol_gproxii.c
new file mode 100644
index 000000000..73cbe8f39
--- /dev/null
+++ b/lib/lfrfid/protocols/protocol_gproxii.c
@@ -0,0 +1,261 @@
+#include <furi.h>
+#include "toolbox/level_duration.h"
+#include "protocol_gproxii.h"
+#include <toolbox/manchester_decoder.h>
+#include <bit_lib/bit_lib.h>
+#include "lfrfid_protocols.h"
+
+#define GPROXII_PREAMBLE_BIT_SIZE (6)
+#define GPROXII_ENCODED_BIT_SIZE  (90)
+#define GPROXII_ENCODED_BYTE_FULL_SIZE \
+    (((GPROXII_PREAMBLE_BIT_SIZE + GPROXII_ENCODED_BIT_SIZE) / 8))
+
+#define GPROXII_DATA_SIZE (12)
+
+#define GPROXII_SHORT_TIME  (256)
+#define GPROXII_LONG_TIME   (512)
+#define GPROXII_JITTER_TIME (120)
+
+#define GPROXII_SHORT_TIME_LOW  (GPROXII_SHORT_TIME - GPROXII_JITTER_TIME)
+#define GPROXII_SHORT_TIME_HIGH (GPROXII_SHORT_TIME + GPROXII_JITTER_TIME)
+#define GPROXII_LONG_TIME_LOW   (GPROXII_LONG_TIME - GPROXII_JITTER_TIME)
+#define GPROXII_LONG_TIME_HIGH  (GPROXII_LONG_TIME + GPROXII_JITTER_TIME)
+
+typedef struct {
+    bool last_short;
+    bool last_level;
+    size_t encoded_index;
+    uint8_t decoded_data[GPROXII_ENCODED_BYTE_FULL_SIZE];
+    uint8_t data[GPROXII_ENCODED_BYTE_FULL_SIZE];
+} ProtocolGProxII;
+
+ProtocolGProxII* protocol_gproxii_alloc(void) {
+    ProtocolGProxII* protocol = malloc(sizeof(ProtocolGProxII));
+    return protocol;
+}
+
+void protocol_gproxii_free(ProtocolGProxII* protocol) {
+    free(protocol);
+}
+
+uint8_t* protocol_gproxii_get_data(ProtocolGProxII* proto) {
+    return proto->data;
+}
+
+void protocol_gproxii_decoder_start(ProtocolGProxII* protocol) {
+    memset(protocol->data, 0, GPROXII_ENCODED_BYTE_FULL_SIZE);
+    protocol->last_short = false;
+}
+
+static bool protocol_gproxii_can_be_decoded(ProtocolGProxII* protocol) {
+    // 96 bit with 5 bit zero parity
+    // 0           10            20            30            40            50            60            70            80            90
+    // |           |             |             |             |             |             |             |             |             |
+    // 012345 6789 0 1234 5 6789 0 1234 5 6789 0 1234 5 6789 0 1234 5 6789 0 1234 5 6789 0 1234 5 6789 0 1234 5 6789 0 1234 5 6789 0 1234 5
+    // ------------------------------------------------------------------------------------------------------------------------------------
+    // 111110 0000 0 1001 0 1101 0 1111 0 1000 0 1001 0 0000 0 1001 0 0000 0 1001 0 0000 0 1001 0 0000 0 1001 0 0000 0 1000 0 0000 0 1001 0
+
+    // Remove header and reverse bytes on the remaining 72 bits
+    //
+    // 0          10         20         30          40         50         60         70
+    // |          |          |          |           |          |          |          |
+    // 01234567 89012345 67890123 45678901 23456789 01234567 89012345 67890123 45678901
+    // --------------------------------------------------------------------------------
+    // 00001001 11011111 10001001 00001001 00001001 00001001 00001001 00001000 00001001 - Without parity
+    // 10010000 11111011 10010001 10010000 10010000 10010000 10010000 00010000 10010000 - Reversed
+    // 10010000 01101011 00000001 00000000 00000000 00000000 00000000 10000000 00000000 - XOR all bytes from 1 using byte 0
+
+    // 72 Bit Guardall/Verex/Chubb GProx II 26 bit key with 16 bit profile
+    // 0          10          20        30          40         50          60        70
+    // |          |           |         |           |          |           |         |
+    // 01234567 890123 45 6789012345678901 2 34567890 1234567890123456 7 89012345678901
+    // --------------------------------------------------------------------------------
+    // XORVALUE LLLLLL DD PPPPPPPPPPPPPPPP E FFFFFFFF CCCCCCCCCCCCCCCC O UUUUUUUUUUUUUU
+    // 10010000 011010 11 0000000100000000 0 00000000 0000000000000001 0 00000000000000 - Profile: 256 FC: 0 Card: 1
+
+    // 72 Bit Guardall/Verex/Chubb GProx II 36 bit key with 26 bit profile
+    // 0          10          20        30        40          50         60         70
+    // |          |           |         |         |           |          |          |
+    // 01234567 890123 45 67890123456789012345678901 2 34567890 1234567890123456 7 8901
+    // --------------------------------------------------------------------------------
+    // XORVALUE LLLLLL DD PPPPPPPPPPPPPPPPPPPPPPPPPP E FFFFFFFF CCCCCCCCCCCCCCCC O UUUU
+    // 10111000 100100 10 00000001000000000000000000 1 01000000 1000100010111000 1 0000 - Profile: 262144 FC: 64 Card: 35000
+
+    // X = XOR Key, L = Message length, D = 2 bit check digits, P = Profile, E = Wiegand leading even parity
+    // F = Faclity code, C = Card number, O = Wiegand trailing odd parity, U = Unused bits
+
+    // Check 6 bits preamble 111110
+    if(bit_lib_get_bits(protocol->data, 0, 6) != 0b111110) return false;
+
+    // Check always 0 parity on every 5th bit after preamble
+    if(bit_lib_test_parity(protocol->data, 5, GPROXII_ENCODED_BIT_SIZE, BitLibParityAlways0, 5))
+        return false;
+
+    // Start GProx II decode
+    bit_lib_copy_bits(protocol->decoded_data, 0, GPROXII_ENCODED_BIT_SIZE, protocol->data, 6);
+
+    // Remove parity
+    bit_lib_remove_bit_every_nth(protocol->decoded_data, 0, GPROXII_ENCODED_BIT_SIZE, 5);
+
+    // Reverse bytes
+    for(int i = 0; i < 9; i++) {
+        protocol->decoded_data[i] = bit_lib_reverse_8_fast(protocol->decoded_data[i]);
+    }
+
+    // DeXOR from byte 1 using byte 0
+    for(int i = 1; i < 9; i++) {
+        protocol->decoded_data[i] = protocol->decoded_data[0] ^ protocol->decoded_data[i];
+    }
+
+    // Check card length is either 26 or 36
+    int card_len = bit_lib_get_bits(protocol->decoded_data, 8, 6);
+    if(card_len == 26 || card_len == 36) {
+        return true;
+    } else {
+        return false; // If we don't get a 26 or 36 it's not a known card type
+    }
+}
+
+bool protocol_gproxii_decoder_feed(ProtocolGProxII* protocol, bool level, uint32_t duration) {
+    UNUSED(level);
+    bool pushed = false;
+
+    // Bi-Phase Manchester decoding inverse. Short = 1, Long = 0
+    if(duration >= GPROXII_SHORT_TIME_LOW && duration <= GPROXII_SHORT_TIME_HIGH) {
+        if(protocol->last_short == false) {
+            protocol->last_short = true;
+        } else {
+            pushed = true;
+            bit_lib_push_bit(protocol->data, GPROXII_ENCODED_BYTE_FULL_SIZE, true);
+            protocol->last_short = false;
+        }
+    } else if(duration >= GPROXII_LONG_TIME_LOW && duration <= GPROXII_LONG_TIME_HIGH) {
+        if(protocol->last_short == false) {
+            pushed = true;
+            bit_lib_push_bit(protocol->data, GPROXII_ENCODED_BYTE_FULL_SIZE, false);
+        } else {
+            // reset
+            protocol->last_short = false;
+        }
+    } else {
+        // reset
+        protocol->last_short = false;
+    }
+
+    if(pushed && protocol_gproxii_can_be_decoded(protocol)) {
+        return true;
+    }
+
+    return false;
+}
+
+bool protocol_gproxii_encoder_start(ProtocolGProxII* protocol) {
+    protocol->encoded_index = 0;
+    protocol->last_short = false;
+    protocol->last_level = false;
+    return true;
+}
+
+LevelDuration protocol_gproxii_encoder_yield(ProtocolGProxII* protocol) {
+    uint32_t duration;
+    protocol->last_level = !protocol->last_level;
+
+    bool bit = bit_lib_get_bit(protocol->data, protocol->encoded_index);
+
+    // Bi-Phase Manchester encoder inverted
+    if(bit) {
+        // two short pulses for 1
+        duration = GPROXII_SHORT_TIME / 8;
+        if(protocol->last_short) {
+            bit_lib_increment_index(protocol->encoded_index, 96);
+            protocol->last_short = false;
+        } else {
+            protocol->last_short = true;
+        }
+    } else {
+        // one long pulse for 0
+        duration = GPROXII_LONG_TIME / 8;
+        bit_lib_increment_index(protocol->encoded_index, 96);
+    }
+    return level_duration_make(protocol->last_level, duration);
+}
+
+void protocol_gproxii_render_data(ProtocolGProxII* protocol, FuriString* result) {
+    int xor_code = bit_lib_get_bits(protocol->decoded_data, 0, 8);
+    int card_len = bit_lib_get_bits(protocol->decoded_data, 8, 6);
+    int crc_code = bit_lib_get_bits(protocol->decoded_data, 14, 2);
+
+    if(card_len == 26) { // 26 Bit card
+        // Print FC, Card and Length
+        furi_string_cat_printf(
+            result,
+            "FC: %hhu Card: %hu LEN: %hhu\n",
+            bit_lib_get_bits(protocol->decoded_data, 33, 8),
+            bit_lib_get_bits_16(protocol->decoded_data, 41, 16),
+            card_len);
+        // XOR Key, CRC and Profile
+        furi_string_cat_printf(
+            result,
+            "XOR: %hhu CRC: %hhu P: %04hX",
+            xor_code,
+            crc_code,
+            bit_lib_get_bits_16(protocol->decoded_data, 16, 16));
+    } else if(card_len == 36) { // 36 Bit card
+        // Print FC, Card and Length
+        furi_string_cat_printf(
+            result,
+            "FC: %hhu Card: %hu LEN: %hhu\n",
+            bit_lib_get_bits(protocol->decoded_data, 43, 8),
+            bit_lib_get_bits_16(protocol->decoded_data, 51, 16),
+            card_len);
+        // XOR Key, CRC and Profile
+        furi_string_cat_printf(
+            result,
+            "XOR: %hhu CRC: %hhu P: %06lX",
+            xor_code,
+            crc_code,
+            bit_lib_get_bits_32(protocol->decoded_data, 16, 26));
+    } else {
+        furi_string_cat_printf(result, "Read Error\n");
+    }
+}
+
+bool protocol_gproxii_write_data(ProtocolGProxII* protocol, void* data) {
+    LFRFIDWriteRequest* request = (LFRFIDWriteRequest*)data;
+    bool result = false;
+
+    if(request->write_type == LFRFIDWriteTypeT5577) {
+        request->t5577.block[0] = LFRFID_T5577_MODULATION_BIPHASE | LFRFID_T5577_BITRATE_RF_64 |
+                                  (3 << LFRFID_T5577_MAXBLOCK_SHIFT);
+        request->t5577.block[1] = bit_lib_get_bits_32(protocol->data, 0, 32);
+        request->t5577.block[2] = bit_lib_get_bits_32(protocol->data, 32, 32);
+        request->t5577.block[3] = bit_lib_get_bits_32(protocol->data, 64, 32);
+        request->t5577.blocks_to_write = 4;
+        result = true;
+    }
+    return result;
+}
+
+const ProtocolBase protocol_gproxii = {
+    .name = "GProxII",
+    .manufacturer = "Guardall",
+    .data_size = GPROXII_DATA_SIZE,
+    .features = LFRFIDFeatureASK,
+    .validate_count = 3,
+    .alloc = (ProtocolAlloc)protocol_gproxii_alloc,
+    .free = (ProtocolFree)protocol_gproxii_free,
+    .get_data = (ProtocolGetData)protocol_gproxii_get_data,
+    .decoder =
+        {
+            .start = (ProtocolDecoderStart)protocol_gproxii_decoder_start,
+            .feed = (ProtocolDecoderFeed)protocol_gproxii_decoder_feed,
+        },
+    .encoder =
+        {
+            .start = (ProtocolEncoderStart)protocol_gproxii_encoder_start,
+            .yield = (ProtocolEncoderYield)protocol_gproxii_encoder_yield,
+        },
+    .render_data = (ProtocolRenderData)protocol_gproxii_render_data,
+    .render_brief_data = (ProtocolRenderData)protocol_gproxii_render_data,
+    .write_data = (ProtocolWriteData)protocol_gproxii_write_data,
+};
diff --git a/lib/lfrfid/protocols/protocol_gproxii.h b/lib/lfrfid/protocols/protocol_gproxii.h
new file mode 100644
index 000000000..002c3024f
--- /dev/null
+++ b/lib/lfrfid/protocols/protocol_gproxii.h
@@ -0,0 +1,4 @@
+#pragma once
+#include <toolbox/protocols/protocol.h>
+
+extern const ProtocolBase protocol_gproxii;