Lately when receiving SMS messages, I have not been always getting a popup preview and my phone doesnt vibrate. I simply unlock my phone and my SMS badge shows a 1 with it. I am using 4.2.1 and used greenpois0n to jailbreak. I have tried restarting my phone, but I really don't want to reformat my phone until the 4.3 jailbreak is out. Anyone have any suggestions on what to possibly try or what may be causing this? A few people I know also have this issue.