Although it has yet to be formally announced, the HTC Supersonic will be the first phone on the Sprint network to take advantage of 4G service. Unfortunately, 4G service is only available to about 10% of the United States, but the phone will also be compatible with the 3G network. The phone will be powered by Android 2.1 with the HTC Sense user interface. The phone will feature a 4.3 inch touchscreen and a 1GHz Snapdragon processor. Other details regarding battery and camera quality weren't revealed in the leak. By taking advantage of 4G speeds, the phone will be able to average 2-4Mbps of download speed.