T-Mobile: Free $200 Gift Card with Plan

Get a free $200 virtual prepaid Mastercard when you switch to T-Mobile, port in your number, and open a new voice line with any plan. Even better, you'll receive a gift card for each number you port in—up to four lines. That's a total of $800 back, making it one of the best new customer offers we've found from any major carrier. You can bring your own phone or purchase a new one directly from T-Mobile. This offer cannot be combined with any other phone promotion. However, the $35 activation fee will be waived when you purchase your device online.