i was at a party with a few friends and i went to make a phone call on my iphone 3g my phone screen was black as if it were locked and wouldn't come on i figured that it must have been dead i went to plug it into my charger and nothing happened for 3 hours i tried to reset it and still nothing happened so i then tried to link it with my itunes to restore it and my computer can not pick it up! whats wrong with my phone !?!?!?!?!?!?!??!