A full-specifications sheet of the HTC’s high-end X7500 (Athena) shows that the powerful Pocket PC Phone
is not only world quad-band GSM phone, but also world 3G phone supporting tri-band 850/1900/2100 MHz UMTS/HSDPA, just as it is with the TyTN (Cingular 8525). This means it is 100% usable in AT&T (Cingular) network and it’s highly possible that the carrier will offer it in future.
Some of the features of the Athena include 5” VGA display, 8GB hard disc, WiFi and GPS. Check its specifications here.