T-Mobile promotional codes and coupons are available at Tech Bargains, Coupons.com and GoodShop. These sites track how many times the codes and coupons are used successfully.
Tech Bargains includes promotional codes for T-Mobile offers such as discounts on refurbished T-Mobile phones, free tablets or SIM cards, and discounts on phone accessories. The site also offers educational discounts to students and faculty members. Coupons.com also offers educational discounts as well as discounts on T-Mobile family plans and international data plans. GoodShop offers a promotional code for free data to any user who provides his own tablet. In addition, promotional codes and coupons are available for accessories, phones and tablets as well as for free shipping.