iphone 4 not ringing for every call since ios6 upgrade
Since upgrading my iphone 4 to ios6 it doesn't ring for every call and I am getting alot more people diverted to voicemail.
I have tried everything, resetting the phone etc. The DND is switched off.
Researching on the internet and there are quite a few other people experiencing the same problem. Any solutions would be gratefully received.
iPhone 4, iOS 6