So much for that vaunted 4G. T-Mobile, in a blatant admission of their terrible service, is now offering a Signal Booster to customers who complain about awful in-home coverage. The roll-out begins September 7th and while it’s free, there is, of course, a catch or two. First, customers must agree to re-up on a two-year service agreement. Secondly, if you cancel the Booster, you’ll accrue about $500 in fees. Enter at your own risk.