If you buy a Galaxy S7 through T-Mobile between November 11 and November 13, you may be able to get two units for the price of one. The carrier's offer is available to those who are buying an S7 with an Equipment Installment Plan, which costs ~$29 per month with no upfront cost. You must activate the second phone on a qualifying line.

Under the deal, you will technically pay for the second phone each month, but the cost will be reimbursed through bill credits. T-Mobile's last buy one, get one offer for the Galaxy S7 involved a prepaid debit card rather than credits.