[Bugfix][T108-yd][bug-view-2187][voice] sometime dial number string will have a plus number in cb

Only Configure:No
Affected branchmaster
Affected module:voice
Is it affected on:asr
Doc Update:No

Change-Id: Ic5243b9169a06460bceb877b6294784adc6d48c6
diff --git a/mbtk/mbtk_rild_v2/src/ril_call.c b/mbtk/mbtk_rild_v2/src/ril_call.c
index fe9d374..97595fa 100755
--- a/mbtk/mbtk_rild_v2/src/ril_call.c
+++ b/mbtk/mbtk_rild_v2/src/ril_call.c
@@ -361,7 +361,7 @@
     {
         case RIL_MSG_ID_CALL_START: // <string> phone number
         {
-            if(pack->data_len == 0 || pack->data == NULL)
+            if(pack->data_len == 1 || pack->data == NULL)  //  data_len == 1 is wrote by hq at 2025/08/26 for bug 2187
             {
                 err = MBTK_RIL_ERR_UNSUPPORTED;
             }