For Sprint it is WiMAX versus TD-UMTS

Mike correctly points out that the Sprint WiMAX trials with Motorola equipment and Nextel’s trials using TD-UMTS technology from IPWireless show that the company is still trying to figure out best use for it 2.5 GHz spectrum. Either way, the licensed spectrum gives them a leg-up on rivals who would be building networks in unlicensed spectrum.