Great news for folks looking forward to use their smartphones on T-Mobile’s upgraded HSPA+ network. The carrier has just announced 47 additional cities will now be able to experience data downloads at up to 42Mbps. Accessible by its selection of 4G smartphones (Galaxy S 4G, T-Mobile myTouch 4G, T-Mobile G2, T-Mobile Sidekick 4G, T-Mobile G2x, HTC Sensation 4G and the upcoming BlackBerry Bold 9900) and the Rocket 3.0 USB modem, mobile downloads on T-Mobile’s network have never been faster. Hit the break to check out the new cities that have just been added: