PC Magazine has reviewed the Samsung SGH-i607 BlackJack Smartphone which is connected to the Cingular network. 'The BlackJack connects to the Internet using Cingular's ever-expanding HSDPA network, which was in 50 or so metro areas at last count. It's nowhere near as prevalent as Verizon's EV-DO system, but it's catching up. Using the BlackJack as a PC modem, we got an average of 584 kbps downloads, which is slower than EV-DO (where we regularly get 700 kbps or above) but a lot faster than Cingular's national EDGE network, which the BlackJack drops to when it's out of HSDPA range. (EDGE speeds generally hover in the 90-120 kbps range.) The Blackjack also uses EDGE overseas, as opposed to the Cingular 8525 which can hit foreign HSDPA networks.
Read: Samsung SGH-i607 BlackJack - PC Mag