Why doesn't my phone ring?
Since downloading the iOS 7 update,I have not received notifications (vibration or sound) of any kind when my phone is in the sleep mode or the locked screen mode. I've checked every possible setting there is and none has solved this problem. I believe this is a glitch in the update. What can be doe to resolve this issue? Can I revert back to the former iOS?
iPhone 4S, iOS 7