diff --git a/code/application/source/sf_app/code/source/app/sf_service.c b/code/application/source/sf_app/code/source/app/sf_service.c
index 593ba873d..5ed2ed0cb 100755
--- a/code/application/source/sf_app/code/source/app/sf_service.c
+++ b/code/application/source/sf_app/code/source/app/sf_service.c
@@ -1080,12 +1080,12 @@ static SINT32 app_file_transfer(SF_FN_PARAM_S *pfnParam) {
   if (sf_usb_IsInsert())
     return SF_SUCCESS;
 
-  sf_4G_status_set(SF_4G_SENDING);
   SLOGD("STARTUP:[%d]\n", sf_poweron_type_get());
   if (sf_get_cq_signal() == 0) {
     SLOGD("no csq signal\n");
     return SF_SUCCESS;
   }
+  sf_4G_status_set(SF_4G_SENDING);
 
   switch (sf_poweron_type_get()) {
   case SF_MCU_STARTUP_OFF:
@@ -2150,7 +2150,6 @@ int get_gps_location(void)
         strcpy(pCustomerParam->Latitude, location.latitude);
         LogInfo("location.Longitude = %s\n", pCustomerParam->Longitude);
         LogInfo("location.Latitude = %s\n", pCustomerParam->Latitude);
-        sf_save_camera_gps_info();
         return GPS_GET_SUCCEED;
     }
     return GPS_GET_FAILED;
@@ -2195,6 +2194,7 @@ void keep_get_gps_location(const SF_GPS_PARAM param)
                 {
                     NET_SLOGI("FristSendDaily:%d\n", puiPara->FristSendDailyAndGps);
                     sf_set_send_gps_txt(1);
+                    sf_save_camera_gps_info();
                 }
             }
             else //if((puiPara->GpsNumber == 1) && (puiPara->GpsSendFlag != 0))
@@ -2340,13 +2340,13 @@ void sf_save_camera_gps_info(void)
     }
 
     memset(temp,'\0', 200);
-    sprintf(temp, "LATITUDE:%s\r\nLONGITUDE:%s\r\n", puiPara->Latitude, puiPara->Longitude);
+    snprintf(temp, 200, "LATITUDE:%s\r\nLONGITUDE:%s\r\n", puiPara->Latitude, puiPara->Longitude);
 
     printf("[%s:%d] \n%s\n", __FUNCTION__, __LINE__,temp);
 
     if(access((char*)SF_CAMERA_GPS_INFO_FILENAME, F_OK) == 0)
     {
-        system("rm -rf /mnt/sd/gps.txt");
+        system("rm -rf /tmp/gps.txt");
         system("sync");
         printf("[%s:%d] rm\n", __FUNCTION__, __LINE__);