Yesterday i was waiting for a doctors to call for a scheduled appointment and it never came. When i rebooked for today they said they called three times yesterday, my phone did not show any call. This also happens with my landlords number he can't ever call through, so we text. This has also happened before and the number and i can facetime but that is all. I need this fixed as the doctor will be calling at 4:30 today
I had a similar problem where Telus/Koodo/Public and Bell/Virgin (didn't test Lucky) all would not ring. Rogers/Fido (did not test Chatr) and Shaw Mobile and Freedom and a voip app all did ring through.
Nobody could fix it. I finally gave up and installed a different (non-rooted) firmware and it then worked.
Meow has a good idea of watching your phone when a call is attempted. My phone would sit normally on a couple bars. When these calls we made, the phone would jump up in bars indicating the switch to UMTS (3G) then a moment later go no service. The caller got nothing.