i hope u guys can help me with this problem im having. ive noticed that sometimes (maybe 1 of 10 calls) the iphone 4 wont ring when someone is calling me. I do see the caller picture etc, but the default ringtone wont work (the old phone ringtone). This is kinda annoying since im missing calls all the time now at work. SMS / Email and all other sounds works fine. Anyone else having this problem or know what to do? i rather not hard resetting the device since my iphone is jailbroken and it will take to long to try to download all the apps etc.