diff --git a/code/application/source/sf_app/code/include/sf_4g_lpa.h b/code/application/source/sf_app/code/include/sf_4g_lpa.h
index 85c05dacc..55354617f 100755
--- a/code/application/source/sf_app/code/include/sf_4g_lpa.h
+++ b/code/application/source/sf_app/code/include/sf_4g_lpa.h
@@ -71,8 +71,8 @@ void sf_set_wifi_socket(int fd);
 int sf_get_wifi_socket(void);
 void sf_set_wifi_cmd(UINT8 cmd);
 UINT8 sf_get_wifi_cmd(void);
-void sf_network_select(UINT8 profileId, UINT8 ctlType); //SF_CONTROL_TYPE_e ctlType
-void sf_4g_operator_scan(UINT8 mode, UINT8 ctlType); //SF_CONTROL_TYPE_e ctlType
+SINT32 sf_network_select(UINT8 profileId, UINT8 ctlType); //SF_CONTROL_TYPE_e ctlType
+SINT32 sf_4g_operator_scan(UINT8 mode, UINT8 ctlType); //SF_CONTROL_TYPE_e ctlType
 SINT32 sf_lpa_get_esim_iccid(SF_CHAR iccid[][22]);
 void sf_set_esim_card(INT8 flag);
 
diff --git a/code/application/source/sf_app/code/source/4gMng/sf_4g_lpa.c b/code/application/source/sf_app/code/source/4gMng/sf_4g_lpa.c
index 2d6fd26e7..4bc013063 100755
--- a/code/application/source/sf_app/code/source/4gMng/sf_4g_lpa.c
+++ b/code/application/source/sf_app/code/source/4gMng/sf_4g_lpa.c
@@ -333,7 +333,16 @@ static UINT8 WifiCurrentCmd=0;
 LPA_GET_PROFILES_INFO getProfilesInfo;
 LPA_PROFILE_INFO *ProfileData = NULL;
 LPA_PROFILE_INFO ProfileActive;
-
+SF_THREAD_S ScanTskCfg =
+{
+	.IsRun = 0,
+	.TskId = -1,
+};
+SF_THREAD_S NetSelectTskCfg =
+{
+	.IsRun = 0,
+	.TskId = -1,
+};
 void sf_set_wifi_cmd(UINT8 cmd)
 {
 	WifiCurrentCmd = cmd;
@@ -2819,7 +2828,7 @@ void sf_operator_scan_thread(void* args)
 {
 	printf("scan network.\n");
 	struct ThreadArgs* myArgs = (struct ThreadArgs*)args;
-
+    ScanTskCfg.IsRun = 1;
 	UINT8 totalOperator = 0;
 	UINT8 totalProfile = 0;
 	UINT8 i = 0;
@@ -2968,19 +2977,30 @@ void sf_operator_scan_thread(void* args)
 			sf_share_mem_wifi_down(1);
 		
 	}
-						
+	ScanTskCfg.IsRun = 0;
 	
 }
 
-void sf_4g_operator_scan(UINT8 mode, UINT8 ctlType)
+SINT32 sf_4g_operator_scan(UINT8 mode, UINT8 ctlType)
 {
-	pthread_t tOperScanTask;
 
+    SINT32 ret = SF_FAILURE;
 	static struct ThreadArgs args = {0};
 	args.arg1 = mode;
 	args.arg2 = ctlType;
-	
-	pthread_create(&tOperScanTask,NULL,sf_operator_scan_thread,(void *)&args);	
+
+	if(ScanTskCfg.IsRun)
+	{	
+		SLOGE("thread has already run !!!\n");
+		return SF_FAILURE;
+	}
+	ret = pthread_create(&ScanTskCfg.TskId,NULL,sf_operator_scan_thread,(void *)&args);	
+	if(ret != SF_SUCCESS)
+	{	
+        MLOGD("thread  creat fail!\n");
+		return ret;
+	}
+	return SF_SUCCESS;
 }
 
 UINT8 sf_wifi_server_network_select_finish(UINT8 errCode)
@@ -3084,7 +3104,7 @@ void sf_network_select_thread(void* args)
 {
 	struct ThreadArgs* myArgs = (struct ThreadArgs*)args;
 	printf("select network, PID:%d\n", myArgs->arg1);
-
+    NetSelectTskCfg.IsRun = 1;
 	UINT32 ret = SF_LPA_SUCCESS;
 	UINT32 sts = 0;
 	UINT32 retryTime=0;
@@ -3339,19 +3359,29 @@ void sf_network_select_thread(void* args)
 	}
 	
 #endif
-
+    NetSelectTskCfg.IsRun = 0;
 }
 
-void sf_network_select(UINT8 profileId, UINT8 ctlType)
+SINT32 sf_network_select(UINT8 profileId, UINT8 ctlType)
 {
-	pthread_t tNetWorkSeclectTask;
 	SLOGD("sf_network_select,Pid:%d ctlType:%d\n", profileId, ctlType);
-
 	static struct ThreadArgs args = {0};
 	args.arg1 = profileId;
 	args.arg2 = ctlType;
+    SINT32 ret = SF_FAILURE;
 
-	pthread_create(&tNetWorkSeclectTask, NULL, sf_network_select_thread, (void *)&args);
+	if(NetSelectTskCfg.IsRun)
+	{	
+		SLOGE("thread has already run !!!\n");
+		return SF_FAILURE;
+	}
+	ret = pthread_create(&NetSelectTskCfg.TskId,NULL,sf_network_select_thread,(void *)&args);	
+	if(ret != SF_SUCCESS)
+	{	
+        MLOGD("thread  creat fail!\n");
+		return ret;
+	}
+	return SF_SUCCESS;
 }