I got a stylish and perfectly good looking black iphone 3gs, 16 gig from my friend. Everything worked like new but the only problem was that when I plugged the usb cable in to charge, it displayed "this accessory is not supported" message. But I discovered that even though it displayed this message, it was charging in the background and I saw the battery percentage go up. With my fresh mind ofcourse I was irritated by this message and decided to change the battery dock connector. I bought the dock connector for $4 from Ebay and after I changed it, the iphone wont even turn on It just shows a charging symbol when I plug it in via usb cable but never turn on Any help is appreciated!!