A little over a month ago, Mark gave up on his GoPhone SIM, went into an AT&T store with his iPhone 2G in hand, and signed up for a new two year, post-paid plan. The sales rep promised Mark that his corporate discount would apply, and instead of a contract presented just a receipt. Now AT&T is saying there’s no corporate discount on an iPhone purchase—even though he didn’t buy an iPhone, just the service plan—and that he can’t cancel now without paying an ETF because it’s past the 30 day mark.