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 dc1dda73c..27a12d9fb 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
@@ -1746,12 +1746,17 @@ SINT32 sf_sms_read_message(void)
 
 			case SMS_SIM_EXIT:
 
-				if(strstr((const char *)gsmPara, "OK"))
-				{
-					printf("[%s:%d] e\n", __FUNCTION__, __LINE__);
-					goto SF_SMS_READ_MSG_END;
-				}
-
+                if((strstr((const char *)gsmPara, "OK")) || (strstr((const char *)gsmPara, "ERROR")))
+                {
+                    printf("[%s:%d] e\n", __FUNCTION__, __LINE__);
+                    goto SF_SMS_READ_MSG_END;
+                }
+                else if(time%2){
+                    sprintf((char *)gsmPara, "AT+CMGD=1,3\r");
+                    printf("%s:%d %s\n", __FUNCTION__, __LINE__, gsmPara);
+                    ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen((const char *)gsmPara));
+                    SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
+                }
 				break;
 
 			default: