Currently Being ModeratedDec 3, 2012 1:57 PM (in response to yolita)
I've had this problem too since iOS 6. I regularly get missed calls but the phone doesn't ring. Then I get a text message saying someone tried calling. This happens even when I'm sat next to them with full bars of service. I have just switched off 3G and roaming data. Since then - no missed calls. Fingers crossed it stays that way. Software problem I think.
Currently Being ModeratedDec 3, 2012 2:05 PM (in response to Defiled)
No case, occurs everywhere, reset networks settings regularly due to 'missed calls' issue. Trawling through other community discussions I notice there's lots of older post from 2008 saying the same stuff. Must have got sorted on a previous software update and missed again.