i have an iPhone 5 but since 2 weeks people are saying that they are calling me but my phone keeps ringing but i don't get any notifications or anything .. so from the caller side it keeps ringing like i am not answering the phone call, but from my side i don't get anything like no body called (no ringing, miss call or even notification that someone called me). however i can make calls like there is no any problem in my phone. i think this started before upgrading to iOS 8 but then i upgrade and still the same, but is worse, this problem keep happening more often. now my phone is up to date, but this problem is killing me because people start be angry from me. when i restart the phone the problem goes away and i can get calls but then i keep asking my wife to call me so i can know when the problem come back. i also did reset network setting but still the same .. it works fine first then the problem came back .. anyone have a solution for this problem please??