 It is a part of the first line of PDAs directly marketed and sold by HTC.On AT&T/Cingular, the TyTN was the successor to the HTC Wizard, known as the Cingular 8125.Also on AT&T, the TyTN was superseded by the HTC TyTN II, known as the AT&T 8925 and the AT&T Tilt.