C Crystal New member Sep 5, 2010 #1 i purchased an at&t go phone a few months ago, but i broke the screen. i tried putting my sim card in my old cingular phone and it says unregistered sim card. what has to be done to fix it?
i purchased an at&t go phone a few months ago, but i broke the screen. i tried putting my sim card in my old cingular phone and it says unregistered sim card. what has to be done to fix it?
