diff --git a/mbtk/include/mbtk/mbtk_info_api.h b/mbtk/include/mbtk/mbtk_info_api.h
index 14e62cc..3f3e08a 100755
--- a/mbtk/include/mbtk/mbtk_info_api.h
+++ b/mbtk/include/mbtk/mbtk_info_api.h
@@ -138,6 +138,34 @@
     MBTK_CELL_TYPE_LTE
 } mbtk_cell_type_enum;
 
+/*
+    0 : Plmm long character format
+    1 : Plmn Short character format
+    2 : Plmn number format
+*/
+typedef enum
+{
+    MBTK_NET_OPERA_FORMAT_LONG_CHAR = 0,
+    MBTK_NET_OPERA_FORMAT_SHORT_CHAR,
+    MBTK_NET_OPERA_FORMAT_NUMBER,
+} mbtk_net_opera_format_enum;
+
+/*
+    0 : Automatic registration
+    1 : Manual registration
+    2 : Forced cancellation
+    3 : Set format only
+    4 : Manual registration is performed first, and automatic registration fails
+*/
+typedef enum
+{
+    MBTK_NET_OPERA_REG_MODE_AUTO = 0,
+    MBTK_NET_OPERA_REG_MODE_MANUAL,
+    MBTK_NET_OPERA_REG_MODE_LOGOUT,
+    MBTK_NET_OPERA_REG_MODE_SET_FORMAT,
+    MBTK_NET_OPERA_REG_MODE_MANUAL_AUTO,
+} mbtk_net_opera_reg_mode_enum;
+
 typedef struct
 {
     int client_fd;
diff --git a/mbtk/mbtk_rild/src/mbtk_info_server.c b/mbtk/mbtk_rild/src/mbtk_info_server.c
index 9eb165c..a18d51b 100755
--- a/mbtk/mbtk_rild/src/mbtk_info_server.c
+++ b/mbtk/mbtk_rild/src/mbtk_info_server.c
@@ -2314,79 +2314,108 @@
 */
 static int req_net_sel_mode_get(mbtk_net_info_t *net, int *cme_err)
 {
-    //LOG("req_net_sel_mode_get() 0");
-    //sleep(1);
     ATResponse *response = NULL;
     int tmp_int;
+    mbtk_net_opera_format_enum format;
     char *tmp_ptr = NULL;
-    int err = at_send_command_singleline("AT+COPS?", "+COPS:", &response);
-    //LOG("req_net_sel_mode_get() 00");
-    //sleep(1);
-    if (err < 0 || response->success == 0 || !response->p_intermediates){
+    
+    int err = at_send_command("AT+COPS=3,2", &response);
+    if (err < 0 || response->success == 0)
+    {
         if(cme_err != NULL)
+        {
             *cme_err = at_get_cme_error(response);
-        err = -1;
+        }
+        LOGE("[%s] at_send_command err[%d], cme_err[%d], response->success[%d].", __func__, err, *cme_err, response->success);
         goto exit;
     }
-    //LOG("req_net_sel_mode_get() 1");
-    //sleep(1);
+    else
+    {
+        if(response)
+        {
+            at_response_free(response);
+            response = NULL;
+        }
+    }
+    
+    err = at_send_command_singleline("AT+COPS?", "+COPS:", &response);
+    if (err < 0 || response->success == 0 || !response->p_intermediates)
+    {
+        if(cme_err != NULL)
+        {
+            *cme_err = at_get_cme_error(response);
+        }
+        LOGE("[%s] at_send_command_singleline err[%d], cme_err[%d], response->success[%d].", __func__, err, *cme_err, response->success);
+        goto exit;
+    }
+
     char *line = response->p_intermediates->line;
-    if(line == NULL) {
-        LOG("line is NULL");
+    if(line == NULL)
+    {
+        LOGE("[%s] line is NULL.", __func__);
         goto exit;
     }
-    //LOG("req_net_sel_mode_get() 2");
-    //sleep(1);
+
     err = at_tok_start(&line);
     if (err < 0)
     {
+        LOGE("[%s] at_tok_start fail.[%d]", __func__, err);
         goto exit;
     }
-    //LOG("req_net_sel_mode_get() 3");
-    //sleep(1);
+
     err = at_tok_nextint(&line, &tmp_int);
     if (err < 0)
     {
+        LOGE("[%s] net_sel_mode fail.[%d]", __func__, err);
         goto exit;
     }
     net->net_sel_mode = (uint8)tmp_int;
-    //LOG("req_net_sel_mode_get() 4");
-    //sleep(1);
-    // +COPS: 1
-    if(!at_tok_hasmore(&line)) {
+
+    if(!at_tok_hasmore(&line))
+    {
+        LOGE("[%s] no more data.[%d]", __func__);
         goto exit;
     }
-    //LOG("req_net_sel_mode_get() 5");
-    //sleep(1);
+
     err = at_tok_nextint(&line, &tmp_int);
     if (err < 0)
     {
+        LOGE("[%s] format fail.[%d]", __func__, err);
         goto exit;
     }
-    //LOG("req_net_sel_mode_get() 6");
-    //sleep(1);
+    format = (mbtk_net_opera_format_enum)tmp_int;
+    
     err = at_tok_nextstr(&line, &tmp_ptr);
     if (err < 0)
     {
+        LOGE("[%s] plmn fail.[%d]", __func__, err);
         goto exit;
     }
-    // memcpy(net->plmn, tmp_ptr, strlen(tmp_ptr));
-    net->plmn = (uint32)atoi(tmp_ptr);
-    //LOG("req_net_sel_mode_get() 7");
-    //sleep(1);
+    if(format == MBTK_NET_OPERA_FORMAT_NUMBER)
+    {
+        net->plmn = (uint32)atoi(tmp_ptr);
+    }
+    else
+    {
+        LOGE("[%s] plmn format error.", __func__);
+        goto exit;
+    }
+
     err = at_tok_nextint(&line, &tmp_int);
     if (err < 0)
     {
+        LOGE("[%s] net reg type fail.[%d]", __func__, err);
         goto exit;
     }
     net->net_type = (uint8)tmp_int;
 
     net->net_state = (uint8)MBTK_NET_AVIL_STATE_CURRENT;
-
 exit:
-    //LOG("req_net_sel_mode_get() 8");
-    //sleep(1);
-    at_response_free(response);
+    if(response)
+    {
+        at_response_free(response);
+        response = NULL;
+    }
     return err;
 }