I have 2 apple chargers, ones brand new. I was at work and plugged my phone in and the message popped up that said " This accessory may not be supported" So i get home and plug in the new charger and it gives me the same message, Plug it into my computer, same message but it noticed my iPhone.. I cleaned my port and everything and still the same problem. I am on 7.0.4 (jailbroken also) and I really dont want to restore and see if it helps but I have a feeling i might have to. Any ideas< Ive searched everywhere