Originally Posted by infernox
The Cingular folks told me it is a comparison with Rev A.
Assuming it is or not, is UMTS/HSDPA is the only protocol that allows data and voice usage simultaneously (with messing with VOiP?)
If you meant to post "without VoIP" you'd be right. EVDO Rev. A supports voice using VoIP because that network is how the new Sprint 2-way network, utilizing QChat, will operate.