If you're waiting impatiently for the ability hook your laptop in to T-Mobile's blazingly fast 42Mbps HSPA+ network, you are going to have hold tight just a little bit longer. But here's some good news to tide you over: the 21Mbps capable Rocket 4G USB stick is here, and available starting April 17th with new prepaid data plans for those who prefer not to chain themselves to a two-year contract. The $30, 30-day plan will jump from 300MB to 1GB, and the $50 plan will be bumped from 1GB to 3GB. It's not as flashy as the
