T-Mobile is not technically allowed to pitch the HSPA+ network as 4G, but their speed is actually better than Sprint's, which claims they have 4G now. T-Mobile officially announced 4G speends in 15 cities, including Los Angeles or New York, two of the most interesting and, pay attention, visited by tourists cities in the United States. Besides those two, there is also 4G speed in Philadelphia, Las Vegas and Memphis, and also in Atlanta, Houston, Seattle, Tampa, Orlando, Pittsburgh, Greensbro, Charlotte, Winston-Salem, Oklahoma City, Tulsa, New Orleans or Charleston.

Anyway, not all the devices will make a good pair with the network's new speed. Old phone won't probably work. Some of the devices that will work are Behold II, myTouch, myTouch 3G Slide, Garminfone, G1, CLIQ and HD2. T-Mobile is also offerin right new their HSPA+ USB stick in all T-Mobile spots.

Via MobileCrunch