After building up attention, Sprint today launched the Evo 4G as its new halo phone. Previously nicknamed the Supersonic, the Android 2.1 range leader represents the first 4G phone in the US and should use the 3-6Mbps WiMAX speeds for features that aren't as practical on 3G. It carries a front 1.3-megapixel camera for video chat and can record 720p video that it can upload.
