Also know as the HTC Kaiser or HTC P4550 or branded with the carriers names such as AT&T Tilt or AT&T 8925, T-Mobile Vario III, Vodafone v1615, SFR v1615, Swisscom XPA1615, and Xda Stellar. The TyTN II is a full featured PDA-phone running Windows Mobile 6 Professional a 2.8" sliding QVGA touch screen display that slides up and tilts with a 41-key QWERTY keyboard, a jog wheel, a 3.0 Megapixel camera, and GPS.