[AC Question]

The phone will sometimes receive the incoming call and other times not.
No issue with signal.
Went through all the setting as used on my other LG4.

I tried a few times calling the phone.
No indication or sound for the incoming call.
Received a sms notification regarding the missed call.

Later the same day, called the phone and it was ringing.
10 min later, another test call - no rining (same problem.)

Did the software updated still same problem.

[Rukbat]

Bring it to the carrier. There can be many causes, some caused by problems with the carrier.