diff --git a/application/quectel_CM_5G_M/src/QCQMI.h b/application/quectel_CM_5G_M/src/QCQMI.h
index e9cab6b..63ca3cc 100644
--- a/application/quectel_CM_5G_M/src/QCQMI.h
+++ b/application/quectel_CM_5G_M/src/QCQMI.h
@@ -314,6 +314,11 @@ typedef struct _QMI_TLV
 #define QMUX_CTL_FLAG_TYPE_IND      0x04
 #define QMUX_CTL_FLAG_MASK_COMPOUND 0x01
 #define QMUX_CTL_FLAG_MASK_TYPE     0x06 // 00-cmd, 01-rsp, 10-ind
+// Add these definitions to the DMS message types section
+#define QMIDMS_FOXCONN_SET_FCC_AUTH_REQ           0x555C
+#define QMIDMS_FOXCONN_SET_FCC_AUTH_RESP          0x555C
+#define QMIDMS_FOXCONN_SET_FCC_AUTH_V2_REQ        0x555D
+#define QMIDMS_FOXCONN_SET_FCC_AUTH_V2_RESP       0x555D
 
 #pragma pack(pop)
 
diff --git a/application/quectel_CM_5G_M/src/QCQMUX.h b/application/quectel_CM_5G_M/src/QCQMUX.h
index eb42dd8..640f59a 100644
--- a/application/quectel_CM_5G_M/src/QCQMUX.h
+++ b/application/quectel_CM_5G_M/src/QCQMUX.h
@@ -399,25 +399,25 @@ typedef struct _QCTLV_PKT_STATISTICS
 //#ifdef QC_IP_MODE
 
 /*
-    �Bit 0 �Profile identifier
-    �Bit 1 �Profile name
-    �Bit 2 �PDP type
-    �Bit 3 �APN name
-    �Bit 4 �DNS address
-    �Bit 5 �UMTS/GPRS granted QoS
-    �Bit 6 �Username
-    �Bit 7 �Authentication Protocol
-    �Bit 8 �IP address
-    �Bit 9 �Gateway information (address and subnet mask)
-    �Bit 10 �PCSCF address using a PCO flag
-    �Bit 11 �PCSCF server address list
-    �Bit 12 �PCSCF domain name list
-    �Bit 13 �MTU
-    �Bit 14 �Domain name list
-    �Bit 15 �IP family
-    �Bit 16 �IM_CM flag
-    �Bit 17 �Technology name
-    �Bit 18 �Operator reserved PCO
+    �?Bit 0 �?Profile identifier
+    �?Bit 1 �?Profile name
+    �?Bit 2 �?PDP type
+    �?Bit 3 �?APN name
+    �?Bit 4 �?DNS address
+    �?Bit 5 �?UMTS/GPRS granted QoS
+    �?Bit 6 �?Username
+    �?Bit 7 �?Authentication Protocol
+    �?Bit 8 �?IP address
+    �?Bit 9 �?Gateway information (address and subnet mask)
+    �?Bit 10 �?PCSCF address using a PCO flag
+    �?Bit 11 �?PCSCF server address list
+    �?Bit 12 �?PCSCF domain name list
+    �?Bit 13 �?MTU
+    �?Bit 14 �?Domain name list
+    �?Bit 15 �?IP family
+    �?Bit 16 �?IM_CM flag
+    �?Bit 17 �?Technology name
+    �?Bit 18 �?Operator reserved PCO
 */
 #define QMIWDS_GET_RUNTIME_SETTINGS_MASK_IPV4DNS_ADDR       (1 << 4)
 #define QMIWDS_GET_RUNTIME_SETTINGS_MASK_IPV4_ADDR          (1 << 8)
@@ -4067,6 +4067,25 @@ typedef struct _QMIUIM_SET_CARD_SLOT_REQ_MSG
 #define QMI_COEX_GET_WWAN_STATE_REQ 0x22
 #define QMI_COEX_GET_WWAN_STATE_RESP 0x22
 
+// Add these structure definitions after existing message structures
+
+#ifdef CONFIG_FOXCONN_FCC_AUTH
+typedef struct _QMIDMS_FOXCONN_SET_FCC_AUTH_REQ_MSG
+{
+   USHORT Type;
+   USHORT Length;
+   UCHAR  TLVType;
+   USHORT TLVLength;
+   UCHAR  magic_value;
+} __attribute__ ((packed)) QMIDMS_FOXCONN_SET_FCC_AUTH_REQ_MSG, *PQMIDMS_FOXCONN_SET_FCC_AUTH_REQ_MSG;
+
+typedef struct _QMIDMS_FOXCONN_SET_FCC_AUTH_V2_REQ_MSG
+{
+   USHORT Type;
+   USHORT Length;
+} __attribute__ ((packed)) QMIDMS_FOXCONN_SET_FCC_AUTH_V2_REQ_MSG, *PQMIDMS_FOXCONN_SET_FCC_AUTH_V2_REQ_MSG;
+#endif
+
 typedef struct {
 
   uint32_t freq;
@@ -4293,6 +4312,10 @@ typedef struct _QMUX_MSG
       QMIWDS_ADMIN_SET_DATA_FORMAT_REQ_MSG      SetDataFormatReq;
       QMI_WDA_SET_LOOPBACK_CONFIG_REQ_MSG       SetLoopBackReq;
       QMI_WDA_SET_LOOPBACK_CONFIG_IND_MSG       SetLoopBackInd;	  
+#ifdef CONFIG_FOXCONN_FCC_AUTH
+    QMIDMS_FOXCONN_SET_FCC_AUTH_REQ_MSG FoxconnSetFccAuthReq;
+    QMIDMS_FOXCONN_SET_FCC_AUTH_V2_REQ_MSG FoxconnSetFccAuthV2Req;
+#endif
    };
 } __attribute__ ((packed)) QMUX_MSG, *PQMUX_MSG;
 
diff --git a/application/quectel_CM_5G_M/src/QMIThread.c b/application/quectel_CM_5G_M/src/QMIThread.c
index 8f7e866..ca49704 100644
--- a/application/quectel_CM_5G_M/src/QMIThread.c
+++ b/application/quectel_CM_5G_M/src/QMIThread.c
@@ -1832,6 +1832,88 @@ static int requestQueryDataCall(UCHAR  *pConnectionStatus, int curIpFamily) {
     return 0;
 }
 
+// Add these implementations after existing function implementations
+
+#ifdef CONFIG_FOXCONN_FCC_AUTH
+// Make sure these functions are static to avoid symbol conflicts
+static USHORT DmsFoxconnSetFccAuthenticationReq(PQMUX_MSG pMUXMsg, void *arg) {
+    UCHAR magic_value = *((UCHAR *)arg);
+    
+    pMUXMsg->FoxconnSetFccAuthReq.TLVType = 0x01;
+    pMUXMsg->FoxconnSetFccAuthReq.TLVLength = cpu_to_le16(1);
+    pMUXMsg->FoxconnSetFccAuthReq.magic_value = magic_value;
+    
+    return sizeof(QMIDMS_FOXCONN_SET_FCC_AUTH_REQ_MSG);
+}
+
+static USHORT DmsFoxconnSetFccAuthenticationV2Req(PQMUX_MSG pMUXMsg, void *arg) {
+    FOXCONN_FCC_AUTH_V2_T *fcc_auth = (FOXCONN_FCC_AUTH_V2_T *)arg;
+    USHORT TLVLength = 0;
+    UCHAR *pTLV;
+    
+    pTLV = (UCHAR *)(&pMUXMsg->FoxconnSetFccAuthV2Req + 1);
+    
+    // Magic string TLV (0x01)
+    *pTLV++ = 0x01; // TLV Type
+    *(USHORT *)pTLV = cpu_to_le16(strlen(fcc_auth->magic_string));
+    pTLV += 2;
+    memcpy(pTLV, fcc_auth->magic_string, strlen(fcc_auth->magic_string));
+    pTLV += strlen(fcc_auth->magic_string);
+    TLVLength += 3 + strlen(fcc_auth->magic_string);
+    
+    // Magic number TLV (0x02)
+    *pTLV++ = 0x02; // TLV Type
+    *(USHORT *)pTLV = cpu_to_le16(1);
+    pTLV += 2;
+    *pTLV++ = fcc_auth->magic_number;
+    TLVLength += 4;
+    
+    return sizeof(QMIDMS_FOXCONN_SET_FCC_AUTH_V2_REQ_MSG) + TLVLength;
+}
+
+// These functions should NOT be static since they're used externally
+int requestFoxconnSetFccAuthentication(UCHAR magic_value) {
+    PQCQMIMSG pRequest;
+    PQCQMIMSG pResponse;
+    PQMUX_MSG pMUXMsg;
+    int err;
+
+    dbg_time("%s(magic_value=0x%02x)", __func__, magic_value);
+
+    pRequest = ComposeQMUXMsg(QMUX_TYPE_DMS, QMIDMS_FOXCONN_SET_FCC_AUTH_REQ, DmsFoxconnSetFccAuthenticationReq, &magic_value);
+    err = QmiThreadSendQMI(pRequest, &pResponse);
+    qmi_rsp_check_and_return();
+
+    free(pResponse);
+    return 0;
+}
+
+int requestFoxconnSetFccAuthenticationV2(const char *magic_string, UCHAR magic_number) {
+    PQCQMIMSG pRequest;
+    PQCQMIMSG pResponse;
+    PQMUX_MSG pMUXMsg;
+    int err;
+    FOXCONN_FCC_AUTH_V2_T fcc_auth;
+
+    dbg_time("%s(magic_string='%s', magic_number=0x%02x)", __func__, magic_string, magic_number);
+    
+    if (!magic_string || strlen(magic_string) >= sizeof(fcc_auth.magic_string)) {
+        dbg_time("%s: Invalid magic_string", __func__);
+        return -1;
+    }
+
+    strcpy(fcc_auth.magic_string, magic_string);
+    fcc_auth.magic_number = magic_number;
+
+    pRequest = ComposeQMUXMsg(QMUX_TYPE_DMS, QMIDMS_FOXCONN_SET_FCC_AUTH_V2_REQ, DmsFoxconnSetFccAuthenticationV2Req, &fcc_auth);
+    err = QmiThreadSendQMI(pRequest, &pResponse);
+    qmi_rsp_check_and_return();
+
+    free(pResponse);
+    return 0;
+}
+#endif
+
 static int requestSetupDataCall(PROFILE_T *profile, int curIpFamily) {
     PQCQMIMSG pRequest;
     PQCQMIMSG pResponse;
@@ -2555,6 +2637,10 @@ const struct request_ops qmi_request_ops = {
 #ifdef CONFIG_COEX_WWAN_STATE
     .requestGetCoexWWANState = requestGetCoexWWANState,
 #endif
+#ifdef CONFIG_FOXCONN_FCC_AUTH
+    .requestFoxconnSetFccAuthentication = requestFoxconnSetFccAuthentication,
+    .requestFoxconnSetFccAuthenticationV2 = requestFoxconnSetFccAuthenticationV2,
+#endif
 };
 
 #ifdef CONFIG_CELLINFO
diff --git a/application/quectel_CM_5G_M/src/QMIThread.h b/application/quectel_CM_5G_M/src/QMIThread.h
index b088e42..546b958 100644
--- a/application/quectel_CM_5G_M/src/QMIThread.h
+++ b/application/quectel_CM_5G_M/src/QMIThread.h
@@ -20,6 +20,7 @@
 //#define CONFIG_REG_QOS_IND
 //#define CONFIG_GET_QOS_INFO
 //#define CONFIG_GET_QOS_DATA_RATE
+#define CONFIG_FOXCONN_FCC_AUTH
 
 #if (defined(CONFIG_REG_QOS_IND) || defined(CONFIG_GET_QOS_INFO) || defined(CONFIG_GET_QOS_DATA_RATE))
 #ifndef CONFIG_REG_QOS_IND
@@ -344,7 +345,20 @@ struct request_ops {
     int (*requestRegisterQos)(PROFILE_T *profile);
     int (*requestGetQosInfo)(PROFILE_T *profile);
     int (*requestGetCoexWWANState)(void);
+#ifdef CONFIG_FOXCONN_FCC_AUTH
+    int (*requestFoxconnSetFccAuthentication)(UCHAR magic_value);
+    int (*requestFoxconnSetFccAuthenticationV2)(const char *magic_string, UCHAR magic_number);
+#endif
 };
+
+// Add structure for V2 parameters
+#ifdef CONFIG_FOXCONN_FCC_AUTH
+typedef struct {
+    char magic_string[256];
+    UCHAR magic_number;
+} FOXCONN_FCC_AUTH_V2_T;
+#endif
+
 extern const struct request_ops qmi_request_ops;
 extern const struct request_ops mbim_request_ops;
 extern const struct request_ops atc_request_ops;