High-Speed Downlink Packet Access (HSDPA)? That is 3G protocol used in UMTS networks. (When you see an "H" in your signal bar that is what it is referring to. Also, when you see an "E" in the signal bar that is short for EDGE (Enhanced Data GSM Environment)....that means 2G sh*t speeds.) FYI: (W)CDMA. That is GSM's US doppelganger. And people say I use too many acronyms when I use Army talk.