While it is possible to get your iPhone working on T-Mobile if you unlock it, you’re stuck with the excruciatingly slow EDGE speed — but that’s all about to change. T-Mobile is gearing up to roll out its new 4G network, and it’s the right spectrum to work with iPhones.The announcement states:
As part of the company’s network modernization effort, T-Mobile also plans to launch 4G HSPA+ service in the 1900 MHz band in a large number of markets by the end of the year. Network modernization trials have shown up to a 33 percent increase in HSPA+ data speeds as well as improved in-building coverage. Rolling out 4G HSPA+ services in the 1900 MHz band will also provide customers with the ability to use a broader range of devices, including the iPhone, on T-Mobile’s 4G network.
Even though billed as 4G, the iPhone 4S can already use the HSPA+ network, meaning that 4S users will be able to get decent speeds on T-Mobile.
Hopefully this also means the last of the big four carriers will grab an official release of the iPhone with the upcoming launch.