HTC Touch HD The HTC Touch HD is the latest tribute to HTC's growing reputation as mobile phone manufacturers. The Touch HD has a very impressive 3.8 inch touch-screen display powered by TouchFLO technology. Other features of the HTC Touch HD are a 5 megapixel camera, Wi-Fi connectivity, Pocket Office, Windows Mobile 6.1 Professional operating system, MP3 player and stereo FM radio with RDS.