been having this problem ever since i jailbroke. already restored it two times. It works ok non jailbroken. But after adding not too many cydia apps it has issues. I was trying to test it after everything i installed but somewhere it starting having issues again im testing it to my ipad that has iMessage. i can receive mms but not send. people not on imessage say they cant get my pictures either. dont understand whats up with 6.1 and jailbreaking or just bad luck?