Oh, TDMA, we hardly knew you! You and your analog friends over at Cingular are still used by 2.5 million former AT&T subscribers, but by 2008 they'll have to buy a new GSM phone or lose service. Fair? No. An example of what happens when you invest too heavily in one, proprietary standard? Absolutely!
Cingular phasing out TDMA by 2008 [MobileTracker]