
T-Mobile, jokingly saying it “announced its own version of the Boston Tea Party,” will be offering existing and new T-Mobile customers with unlimited data some exclusive savings this tax season starting on February 1.
If you are an existing or new T-Mobile customer with unlimited data, you'll be able to purchase a smartphone and get back what you pay in sales tax. This actually covers every new smartphone T-Mobile sells. You will have to purchase a phone on an Equipment Installment Plan, but can apply this deal up to 12 lines, so it'll work for your family or even your small business.
You're actually getting more than sales tax back. After you purchase your smartphone, you have to go online and submit your information on T-Mobile's website. Once you do, T-Mobile will ship you a prepaid MasterCard back with 11.2% of your phone's original price. In other words, you could get close to $100 back on a lot of the new flagships available.

On top of that, T-Mobile is offering a second rebate, which will give customers $150 back. For each and every line you switch over to the T-Mobile One plan, for up to 12 lines, you'll get $150 back for a limited time only.
If you're in the market for a new smartphone, T-Mobile is offering some sweet savings you'll want to take advantage of.
source: T-Mobile