TUAW is reporting that AT&T has started sending iPhone GoPhone (pre-paid) customers text messages informing them that after June 17th AT&T will no longer offer GoPhone to these customers. If these customers want to continue to use their iPhone, AT&T will require them to choose an approved plan, and sign a 2 year contract with AT&T. AT&T needs to seriously work on their customer relation skills. A text message??? C'mon...