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 432881dd2..01c33ba62 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
@@ -230,7 +230,7 @@ void sf_usb_net_init(void)
 			sprintf(cmdStr, "/usr/bin/quectel-CM-EG91 -n %d&", E_PDP_INDEX);
 		}
 		system(cmdStr);
-		sleep(3);
+		//sleep(3);
 	}
 	
 	return;
@@ -289,10 +289,10 @@ SINT32 sf_USB_net_init(void)
             } 
             else 
             {
-                sleep(1);
+                sf_sleep_ms(500);
             }
         }
-        sf_net_dns_ck();
+        //sf_net_dns_ck();
         return ret;
     }
 
@@ -1618,9 +1618,11 @@ static SINT32 app_Register_Net_startup_mode(SF_FN_PARAM_S *pfnParam)
 	if (pCustomerParam->QLogSwitch == 1)
 	  sf_app_qlog_start();
 #endif
-
-	s32ret = sf_4G_sim_init(pfnParam);
-	SF_APPCOMM_CHECK_RETURN(s32ret, SF_APP_ERROR_REQUEST);
+        if (pCustomerParam->GprsMode != 1)
+        {
+            s32ret = sf_4G_sim_init(pfnParam);
+            SF_APPCOMM_CHECK_RETURN(s32ret, SF_APP_ERROR_REQUEST);
+        }
 
         s32ret = sf_4G_register_net_auto(pfnParam);
         if (s32ret != SF_SUCCESS) {
@@ -1677,9 +1679,9 @@ static SINT32 app_Register_Net_startup_mode(SF_FN_PARAM_S *pfnParam)
         // }
 
         SF_APPCOMM_CHECK_RETURN(s32ret, SF_APP_ERROR_REQUEST);
-        sf_4G_usb_net_apn_cfg(pfnParam);
-        set_at_parament();
-        sf_USB_net_init();
+        // sf_4G_usb_net_apn_cfg(pfnParam);
+        // set_at_parament();
+        // sf_USB_net_init();
 
         s32ret = sf_get_utc();
 
@@ -1814,9 +1816,9 @@ static SINT32 app_Register_Net_startup_mode(SF_FN_PARAM_S *pfnParam)
 	    pCustomerParam->NetWorkNeedSearch = 0;
 	}
 	SF_APPCOMM_CHECK_RETURN(s32ret, SF_APP_ERROR_REQUEST);
-	sf_4G_usb_net_apn_cfg(pfnParam);
-	set_at_parament();
-	sf_USB_net_init();
+	// sf_4G_usb_net_apn_cfg(pfnParam);
+	// set_at_parament();
+	// sf_USB_net_init();
 
 	s32ret = sf_get_utc();
 
@@ -1844,8 +1846,13 @@ static SINT32 app_Register_Net_startup_mode(SF_FN_PARAM_S *pfnParam)
 	  sf_app_qlog_start();
 #endif
 
-    s32ret = sf_4G_sim_init(pfnParam);
-    SF_APPCOMM_CHECK_RETURN(s32ret, SF_APP_ERROR_REQUEST);
+
+    // if (pCustomerParam->GprsMode != 1)
+    // {
+    //     s32ret = sf_4G_sim_init(pfnParam);
+    //     SF_APPCOMM_CHECK_RETURN(s32ret, SF_APP_ERROR_REQUEST);
+    // }
+
 
     s32ret = sf_4G_register_net_auto(pfnParam);
     SF_APPCOMM_CHECK_RETURN(s32ret, SF_APP_ERROR_REQUEST);