Buy any smartphone from T-Mobile, get 11.2% of its price back via prepaid card (from February 1)

T-Mobile's (successful) strategy recently has been to constantly make waves in the wireless industry by announcing a new consumer-focused move every few weeks or so. And today is no exception. The latest campaign from the magenta carrier is billed as "its own version of the Boston Tea Party", and is all about taxes - but in a good way. Starting on February 1, when you purchase any smartphone from T-Mobile using an Equipment Installment Plan (EIP) on a One or Simple Choice Unlimited plan, you will receive 11.2% of the device's full price back in the form of a prepaid card. The amount you...