So I finally broke down and re-jail broke my iPhone 4 to 4.2.1 and Im getting things back in order except for there's this one issue I cant find a fix for. It seems whenever I receive text messages the only thing my phone will do is vibrate. I've done the obvious things such as check my settings (ringer and vib) and I've even tried changing messaging alert tones as well. When Im in the settings changing the tones I can hear the sound just fine. I've uninstalled applications that I thought might be conflicting (Lock screen, Notifier) and its still giving me grief. The only other thing that could possibly be giving me issues would be the T-mobile MMS fix thats available on the LEI repository but without that patch I couldn't send or receive MMS. Its crazy because all of these things listed above worked great on my phone when I was on 4.0.1? Any help or suggestions would be greatly appreciated.