The deal is valid on every new smartphone that T-Mobile sells, including iPhones. Each smartphone must be activated with a T-Mobile ONE or Simple Choice Unlimited 4G LTE plan—up to 12 lines qualify for the deal. The prepaid MasterCard must be redeemed within 30 days and it will take 6-8 weeks to arrive.
Earlier this month, T-Mobile announced that the price of its T-Mobile ONE plan now includes sales taxes and all other additional charges. In other words, the price you see is the price you pay—that's $70 for the first line, $50 for the second line, and $20 for each additional line. AutoPay is required.
The carrier also launched a "Tax Rebate" promotion earlier this month. Every customer who switches to T-Mobile from another carrier will receive a $150 prepaid MasterCard, with no device trade-in required—up to 12 lines qualify for the deal. The promotion cannot be combined with Carrier Freedom.