Ever since the software upgrade my phone sometimes does not receive incoming calls when it's in sleep mode. It doesn't wake up, ring, buzz or anything. It doesn't record the missed calls in the Call Log. And if the caller left a voice message, it doesn't show the voice mail puzzle piece in the unlock screen.
This afternoon my wife tried calling me while my phone was asleep (screen saver on , but not powered off).
She was using her ATT wireless. We were in the same room, and she had here speaker on. So I could hear
her phone dialing and my line ringing. Nonetheless, there was no response from my phone for several rings. So I pressed the right side button, woke up my phone and unlock it, then it began to ring!
Later I tried calling my phone from my work phone while it was sleeping. It woke by itself up and rang immediately. This was an ATT land line.
What is going on?
I looked through every menu I could find to see if there is a setting I need to change. I can't find anything relating to this problem. Could it be an issue with Verizon vs ATT Wireless?
I would greatly appreciate any help!