T-Mobile just recently announced its new WebConnect Rocket USB Modem capable to reach speeds up to 21Mbps while Sprint already offers WiMax service for quite a while. PCWorld has compared both services in mayor cities like Las Vegas and Philadelphia.
About the WebConnect Rocket : T-Mobile’s first HSPA+ modem is even faster than the WiMAX devices we tested. But T-Mobile needs to provide a clear picture of their service plans and network buildout before we jump on board.
About Sprint Modem : If you’re connecting with Sprint, there’s no reason to get a 3G-only modem any more. Step up to a 3G/WiMAX combo with the U301—just don’t expect too much of WiMAX.
Check the full comparison here.