diff --git a/bsp/src/at_device_ml307.c b/bsp/src/at_device_ml307.c
index 0052824..42480d5 100644
--- a/bsp/src/at_device_ml307.c
+++ b/bsp/src/at_device_ml307.c
@@ -186,7 +186,7 @@ static void urc_tcp_connect_state(struct at_client *client, const char *data, rt
 
     if (sscanf(data, "+MIPOPEN:%d,%d", &id, &err_code) == 2)
     {
-       socket_id = id;
+        socket_id = id;
         {
             switch (err_code)
             {
@@ -954,7 +954,8 @@ static void ml307_init_thread_entry(void *parameter)
             result = -RT_ERROR;
             goto __exit;
         }
-        if(*(uint32_t *)FLASH_IOT_IMEI_ADDR == 0xE339E339)
+         LOG_D("*(rt_uint16_t *)FLASH_IOT_IMEI_ADDR = %#X", *(rt_uint16_t *)FLASH_IOT_IMEI_ADDR);
+        if ((*(rt_uint16_t *)FLASH_IOT_IMEI_ADDR == 0xE339) || (*(uint16_t *)FLASH_IOT_IMEI_ADDR == 0x39E3))
         {
 #define ML307_NETDEV_HWADDR_LEN 8
 #define ML307_IMEI_LEN          15
@@ -1020,8 +1021,9 @@ static void ml307_init_thread_entry(void *parameter)
             rt_thread_mdelay(1000);
         }
         /* set network interface device hardware iccid  */
-          if(*(uint32_t *)FLASH_IOT_ICCID_ADDR == 0xE339E339)
-          {
+        LOG_D("*(rt_uint16_t *)FLASH_IOT_ICCID_ADDR = %#X", *(rt_uint16_t *)FLASH_IOT_ICCID_ADDR);
+        if ((*(rt_uint16_t *)FLASH_IOT_ICCID_ADDR == 0xE339) || (*(uint16_t *)FLASH_IOT_ICCID_ADDR == 0x39E3))
+        {
 
 #define ML307_ICCID_LEN 20
 
@@ -1045,9 +1047,10 @@ static void ml307_init_thread_entry(void *parameter)
             rt_memcpy(ml307.iccid, iccid, ML307_ICCID_LEN);
             Flash_Sys_Cfg(kIotIccidId, ml307.iccid, ML307_ICCID_LEN);
         }
-
+        LOG_D("*(rt_uint16_t *)FLASH_IOT_IMSI_ADDR = %#X", *(rt_uint16_t *)FLASH_IOT_IMSI_ADDR);
         /* set network interface device hardware imsi  */
-          if(*(uint32_t *)FLASH_IOT_IMSI_ADDR == 0xE339E339){
+        if ((*(rt_uint16_t *)FLASH_IOT_IMSI_ADDR == 0xE339) || (*(uint16_t *)FLASH_IOT_IMSI_ADDR == 0x39E3))
+        {
 
 #define ML307_IMSI_LEN 15