hi hoping someone can help please! i have an iphone 4 jailbroke and unlocked. until recently i have been able to have facetime and record videos with no problems. now when i facetime the other person can not hear me, and when i record videos cant hear anything. i can however record voice memos with no problems. is this a hardware fault? i have not changed any settings or anything like that, its just suddenly started happening. do i need to take it to a apple store? only issue i have with doing that is that i would have to restore to factory settings losing my unlock, and if apple dont replace then i am stuck with a locked iphone to tmobile but i use o2. please help!!