diff --git a/code/application/source/sf_app/code/source/4gMng/sf_ftp.c b/code/application/source/sf_app/code/source/4gMng/sf_ftp.c
index 798e9c204..3388604f3 100755
--- a/code/application/source/sf_app/code/source/4gMng/sf_ftp.c
+++ b/code/application/source/sf_app/code/source/4gMng/sf_ftp.c
@@ -1643,7 +1643,7 @@ SINT32 sf_camera_ota_ftp(void)
     if(SF_TRUE == sf_file_IsExsit(tmp)){
         sf_file_remove(tmp);
     }
-
+    sleep(2);
     ret = ftp_download_file(SF_CAM_UP_FILE,tmp,0);
     //if(SUCCESS == ret)
     {
diff --git a/code/application/source/sf_app/code/source/4gMng/sf_sms.c b/code/application/source/sf_app/code/source/4gMng/sf_sms.c
index 341111645..dc1dda73c 100755
--- a/code/application/source/sf_app/code/source/4gMng/sf_sms.c
+++ b/code/application/source/sf_app/code/source/4gMng/sf_sms.c
@@ -2491,24 +2491,27 @@ SINT32 sf_power_off_module_ota(void)
     	/*instant, hybrid mode*/
 	if(CameraCmd.moduleUpdateOTA)
 	{
-		if(app_ttyusb_IsOpen() != SUCCESS)
-		{
-            sf_cmd_camera_restart(1);//usb error,need restart
-		}
-		else
-		{
-			ret = sf_4g_module_ota_ftp();//need restart module
-			
-			//if(ret == OTA_UPDATED_ERROR || ret == OTA_SUCCESS || ret == OTA_VERTION_ERROR || ret == OTA_TIME_OUT)
-			{
-				if(CameraCmd.setPara)
-					pPara_sms_saved->NetWorkNeedSearch = 3;
-				else
-					puiPara->NetWorkNeedSearch = 3;
-				
-				sf_set_para_sava();
-			}
-		}
+        if(0 == sf_check_sd())
+        {
+            if(app_ttyusb_IsOpen() != SUCCESS)
+            {
+                sf_cmd_camera_restart(1);//usb error,need restart
+            }
+            else
+            {
+                ret = sf_4g_module_ota_ftp();//need restart module
+                
+                //if(ret == OTA_UPDATED_ERROR || ret == OTA_SUCCESS || ret == OTA_VERTION_ERROR || ret == OTA_TIME_OUT)
+                {
+                    if(CameraCmd.setPara)
+                        pPara_sms_saved->NetWorkNeedSearch = 3;
+                    else
+                        puiPara->NetWorkNeedSearch = 3;
+                    
+                    sf_set_para_sava();
+                }
+            }
+        }
 	}
     return ret;
 }
@@ -2571,28 +2574,31 @@ SINT32 sf_power_off_module_sd_update(void)
     	/*instant, hybrid mode*/
 	if(CameraCmd.moduleUpdateOTA)
 	{
-		if(app_ttyusb_IsOpen() != SUCCESS)
+        if(0 == sf_check_sd())
 		{
-            sf_cmd_camera_restart(1);//usb error,need restart
-		}
-		else
-		{
-			ret = OTA_NOUPDATE;
-			if(sf_is_4g_module_usb_update_file_exist(updateFileName))
-			{
-				ret = sf_4g_module_sd_usb_update(updateFileName);
-			}
-			
-			if(ret == OTA_UPDATED_ERROR || ret == OTA_SUCCESS || ret == OTA_VERTION_ERROR || ret == OTA_TIME_OUT)
-			{
-				if(CameraCmd.setPara)
-					pPara_sms_saved->NetWorkNeedSearch = 3;
-				else
-					puiPara->NetWorkNeedSearch = 3;
-				
-				sf_set_para_sava();
-			}
-		}
+            if(app_ttyusb_IsOpen() != SUCCESS)
+            {
+                sf_cmd_camera_restart(1);//usb error,need restart
+            }
+            else
+            {
+                ret = OTA_NOUPDATE;
+                if(sf_is_4g_module_usb_update_file_exist(updateFileName))
+                {
+                    ret = sf_4g_module_sd_usb_update(updateFileName);
+                }
+                
+                if(ret == OTA_UPDATED_ERROR || ret == OTA_SUCCESS || ret == OTA_VERTION_ERROR || ret == OTA_TIME_OUT)
+                {
+                    if(CameraCmd.setPara)
+                        pPara_sms_saved->NetWorkNeedSearch = 3;
+                    else
+                        puiPara->NetWorkNeedSearch = 3;
+                    
+                    sf_set_para_sava();
+                }
+            }
+        }
 	}
     return 0;
 }
@@ -2850,7 +2856,7 @@ SINT32 sf_power_off_check_fw_update(void)
 
 	if(CameraCmd.firmwareUpdateOTA)
 	{
-		if(sf_in_card_exist() && sf_is_card())
+		if(0 == sf_check_sd())
 		{
 
 			if(app_ttyusb_IsOpen() != SUCCESS)