T-Mobile USA has announced that its first HSPA+ laptop modem in the webConnect Rocket USB Laptop Stick will be available on Sunday, March 14 for $100 after $50 rebate with new 2 year agreement in Philadelphia area T-Mobile stores, as its nascent HSPA+ network is currently only available in Philadelphia, Pennsylvania.

T-Mobile has also announced new service plans for all webConnect devices in the Even More webConnect data plan which requires a two-year contract at 5GB for $59.99 per month or 200MB of access for $29.99 per month. Even More Plus webConnect data plans, which do not require an agreement cost $49.99 per month for 5GB or $19.99 per month for 200MB of data access. All of the above plans have overage charges set at $0.20 per megabyte.

T-Mobile has also confirmed that its entire 3G network has been upgraded to HSPA 7.2 Mbps data access, which now covers more than 273 U.S. cities and 206 million people. T-Mobile plans to rollout HSPA+ access later this year with a majority of its network upgraded by the end of 2010. Theoretical maximum download speeds of HSPA+ can reach 21Mbps.