diff --git a/code/application/source/sf_app/code/include/sf_eg91_sim.h b/code/application/source/sf_app/code/include/sf_eg91_sim.h
index f90497a10..b52b28fa8 100755
--- a/code/application/source/sf_app/code/include/sf_eg91_sim.h
+++ b/code/application/source/sf_app/code/include/sf_eg91_sim.h
@@ -17,7 +17,7 @@ extern "C" {
 //500ms * 480 = 240s = 4min
 #define SF_QUECTEL_NET_REG_CALLTIME_MAX  	480
 #define SF_MODULE_RESET_WAIT_TIME	30
-
+#define SF_MODULE_CGREG_TIME_S	90
 
 #define SF_NTP_SITE1 			"time.windows.com"
 #define SF_NTP_SITE2 			"time.nist.gov"
diff --git a/code/application/source/sf_app/code/source/4gMng/sf_eg91_sim.c b/code/application/source/sf_app/code/source/4gMng/sf_eg91_sim.c
index f2f0330f7..ecedf8cc0 100755
--- a/code/application/source/sf_app/code/source/4gMng/sf_eg91_sim.c
+++ b/code/application/source/sf_app/code/source/4gMng/sf_eg91_sim.c
@@ -2724,12 +2724,15 @@ SINT32 sf_module_complete_init(void)
                 break;
 
             case QUECTEL_NETREG_DBGCTL:
-                eNetRegLocation = QUECTEL_NETREG_QCFG_NTP;
-                strcpy((char *)gsmPara, "AT+QCFG=\"ntp\",3,5\r");
-                ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen(gsmPara));
-                SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
-                callTime = 0;
-                ttyData.len = strlen(gsmPara) + 2;
+                if(strstr((const char *)gsmPara, "ERROR") || strstr((const char *)gsmPara, "OK"))
+                {
+                    eNetRegLocation = QUECTEL_NETREG_QCFG_NTP;
+                    strcpy((char *)gsmPara, "AT+QCFG=\"ntp\",3,5\r");
+                    ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen(gsmPara));
+                    SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
+                    callTime = 0;
+                    ttyData.len = strlen(gsmPara) + 2;
+                }
                 break;
 
             case QUECTEL_NETREG_QCFG_NTP:
@@ -2882,14 +2885,17 @@ SINT32 sf_module_complete_init(void)
             case QUECTEL_NETREG_CPIN:
 
                 if(SF_STRNCMP(puiPara->ModuleVer, GPRS_MODULE_TYPE_EG915Q, 6) == 0){
-                    eNetRegLocation = QUECTEL_NETREG_READY;
-                    strcpy((char *)gsmPara, "AT+CPIN?\r");
-                    ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen(gsmPara));
-                    SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
-                    ttyData.len = strlen(gsmPara) + 2;
+                    if(strstr((const char *)gsmPara, "ERROR") || strstr((const char *)gsmPara, "OK"))
+                    {
+                        eNetRegLocation = QUECTEL_NETREG_READY;
+                        strcpy((char *)gsmPara, "AT+CPIN?\r");
+                        ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen(gsmPara));
+                        SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
+                        ttyData.len = strlen(gsmPara) + 2;
+                    }
                 }
                 else{
-                    if(strstr((const char *)gsmPara, "OK"))
+                    if(strstr((const char *)gsmPara, "ERROR") || strstr((const char *)gsmPara, "OK"))
                     {
                         eNetRegLocation = QUECTEL_NETREG_READY;
                         strcpy((char *)gsmPara, "AT+CPIN?\r");
@@ -3183,7 +3189,9 @@ SINT32 sf_net_regist_manual(void)
 {
 
     SINT32 ret = SF_SUCCESS;
-
+    SINT64 cTime = 0;
+    SINT64 eTime = 0;
+    double elapsed_time = 0;
     //UINT8 gsmPara[GPRS_INFO_LINE_MAX] = {0};
     SF_QUECTEL_NETREG_E eNetRegLocation = QUECTEL_NETREG_FRIST;
     UINT16 callTime = 0;
@@ -3420,7 +3428,6 @@ SINT32 sf_net_regist_manual(void)
                         	//sprintf((char *)gsmPara, "AT+RSTSET\r");
                         	//sprintf((char *)gsmPara, "AT+CGREG?\r");
                             //eNetRegLocation = QUECTEL_NETREG_CGREG;
-							//callTime = SF_QUECTEL_NET_REG_CALLTIME_MAX; /*4 min*/
 							sprintf((char *)gsmPara, "%s", "AT+CGDCONT=1,\"IPV4V6\",\"\"\r");
 							eNetRegLocation = QUECTEL_NETREG_CGDCONT;
 						}
@@ -3433,7 +3440,7 @@ SINT32 sf_net_regist_manual(void)
                         {
                             sprintf((char *)gsmPara, "AT+CGREG?\r");
                             eNetRegLocation = QUECTEL_NETREG_CGREG;
-                            callTime = SF_QUECTEL_NET_REG_CALLTIME_MAX; /*4 min*/
+                            sf_time(&cTime);
                         }
                         else if(strstr((const char *)puiPara->Sim4gApn, APN_4G_ATT))
                         {
@@ -3484,7 +3491,6 @@ SINT32 sf_net_regist_manual(void)
                     eNetRegLocation = QUECTEL_NETREG_FRIST;
 					//sprintf((char *)gsmPara, "AT+CGREG?\r");
                     //eNetRegLocation = QUECTEL_NETREG_CGREG;
-					//callTime = SF_QUECTEL_NET_REG_CALLTIME_MAX;
                 }
                 else
                 {
@@ -3498,11 +3504,11 @@ SINT32 sf_net_regist_manual(void)
                 if(strstr((const char *)gsmPara, "OK"))
                 {
                     eNetRegLocation = QUECTEL_NETREG_CGREG;
+                    sf_time(&cTime);
                     strcpy((char *)gsmPara, "AT+CGREG?\r");
                     ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen((const char *)gsmPara));
                     SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
 
-                    callTime = SF_QUECTEL_NET_REG_CALLTIME_MAX; /*4 min*/
                     ttyData.cmp = "OK";
                     ttyData.len = strlen(gsmPara) + 2;
                 }
@@ -3544,14 +3550,18 @@ SINT32 sf_net_regist_manual(void)
                 }
                 else
                 {
-                    callTime--;
+                    //callTime--;
                     sprintf((char *)gsmPara, "AT+CGREG?\r");
                     ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen((const char *)gsmPara));
                     SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
 
                     sf_sleep_ms(300);
-
-                    if(callTime == 0)
+                    // time
+                    sf_time(&eTime);
+                    elapsed_time = difftime(eTime, cTime);
+                    // s
+                    //printf("time: %.2f s\n", elapsed_time);
+                    if(elapsed_time > SF_MODULE_CGREG_TIME_S)
                     {
                         if((strstr((const char *)puiPara->Sim4gApn, APNGPRS_WUYUAN1)) || (strstr((const char *)puiPara->Sim4gApn, APNGPRS_WUYUAN2)))
                         {
@@ -3608,7 +3618,6 @@ SINT32 sf_net_regist_manual(void)
                     }
                 }
 
-                callTime = SF_QUECTEL_NET_REG_CALLTIME_MAX; /*4 min*/
 #if MEGA_TEST
 
                 if(puiPara->MegaTestSwitch == 1)
@@ -3627,6 +3636,7 @@ SINT32 sf_net_regist_manual(void)
                 {
                     printf("[%s:%d]:puiPara->OperatorCode:%s,new cimi:%s\n", __FUNCTION__, __LINE__, puiPara->OperatorCode, SimImei);
                     eNetRegLocation = QUECTEL_NETREG_CGREG; //return net reg.
+                    sf_time(&cTime);
                     sprintf((char *)gsmPara, "AT+CGREG?\r");
                     ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen((const char *)gsmPara));
                     SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
@@ -3984,6 +3994,9 @@ SINT32 sf_net_regist_manual(void)
 SINT32 sf_auto_net_reg(void)
 {
 	SINT32 ret = SF_SUCCESS;
+    SINT64 cTime = 0;
+    SINT64 eTime = 0;
+    double elapsed_time = 0;
 	//UINT8 gsmPara[GPRS_INFO_LINE_MAX] = {0};
 	SF_QUECTEL_NETREG_E eNetRegLocation = QUECTEL_NETREG_FRIST;
 	UINT16 callTime = 0;
@@ -4070,6 +4083,7 @@ SINT32 sf_auto_net_reg(void)
 					{
 						eNetRegLocation = QUECTEL_NETREG_CGREG;
 						strcpy((char *)gsmPara, "AT+CGREG?\r");
+                        sf_time(&cTime);
 					}
 					else
 					{
@@ -4151,9 +4165,9 @@ SINT32 sf_auto_net_reg(void)
 
 					if(strstr((const char *)puiPara->Sim4gApn, APN_4G_VERIZON))
 					{
-						callTime = SF_QUECTEL_NET_REG_CALLTIME_MAX; /*4 min*/
 						eNetRegLocation = QUECTEL_NETREG_CGREG;
 						strcpy((char *)gsmPara, "AT+CGREG?\r");
+                        sf_time(&cTime);
 					}
 					else if(strstr((const char *)puiPara->Sim4gApn, APN_4G_ATT))
 					{
@@ -4177,11 +4191,11 @@ SINT32 sf_auto_net_reg(void)
 				if(strstr((const char *)gsmPara, "OK"))
 				{
 					eNetRegLocation = QUECTEL_NETREG_CGREG;
+                    sf_time(&cTime);
 					strcpy((char *)gsmPara, "AT+CGREG?\r");
 					ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen((const char *)gsmPara));
 					SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);
 
-					callTime = SF_QUECTEL_NET_REG_CALLTIME_MAX; /*4 min*/
                     ttyData.cmp = "OK";
                     ttyData.len = strlen(gsmPara) + 2;
 				}
@@ -4215,7 +4229,11 @@ SINT32 sf_auto_net_reg(void)
 
 					sf_sleep_ms(300);
 
-					if(callTime == 0)
+					sf_time(&eTime);
+                    elapsed_time = difftime(eTime, cTime);
+                    // s
+                    //printf("time: %.2f s\n", elapsed_time);
+                    if(elapsed_time > SF_MODULE_CGREG_TIME_S)
 					{
 						if((strstr((const char *)puiPara->Sim4gApn, APNGPRS_WUYUAN1)) || (strstr((const char *)puiPara->Sim4gApn, APNGPRS_WUYUAN2)))
 						{
@@ -4274,7 +4292,6 @@ SINT32 sf_auto_net_reg(void)
 					}
 				}
 
-				callTime = SF_QUECTEL_NET_REG_CALLTIME_MAX; /*4 min*/
 #if MEGA_TEST
 
 				if(puiPara->MegaTestSwitch == 1)
@@ -4293,6 +4310,7 @@ SINT32 sf_auto_net_reg(void)
 				{
 					printf("[%s:%d]:puiPara->OperatorCode:%s,new cimi:%s\n", __FUNCTION__, __LINE__, puiPara->OperatorCode, SimImei);
 					eNetRegLocation = QUECTEL_NETREG_CGREG; //return net reg.
+                    sf_time(&cTime);
 					sprintf((char *)gsmPara, "AT+CGREG?\r");
 					ttyRet = sf_hal_ttyusb2_write(gsmPara, strlen((const char *)gsmPara));
 					SF_CHECK_RETURN(ttyRet, SF_GPRS_MODULE_ERROR_WRITE);