I bet you were not expecting T-Mobile to be the first carrier in the USA to deploy a 21Mbps HSPA+ network. While AT&T is working on theoretical speeds of 7.2Mbps, T-Mobile has gone ahead and deployed HSPA+ in Philadelphia. T-Mobile has twenty cell towers which will handle HSPA+ over Philadelphia but T-Mobile plans to add even more markets in the following year. It looks like HSPA+ will be T-Mo’s transition network from 3G to LTE so don’t get alarmed if you live in Philly and you’re not able to connect to that HSPA+ network at the moment. The top speed is theoretical for now and you’ll need some decent gadgets capable of handling such technology anyway before jumping to any conclusions.

via wirelessweek