https://support.t-mobile.com/docs/DOC-39765

For a limited time, get a free Apple iPhone X or XR, OR get $ 750 off an Apple iPhone XS or XS Max when you purchase it at Full Retail Price (plus tax) from a Costco Warehouse, or on EIP from a Military location or via Costco’s Direct Delivery option, activate new voice lines, and trade in a qualifying iOS device. Fulfilled via rebate and trade-in credit.

Get this deal

When is this deal available?
April 26, 2019 through TBD
Where can I get this deal?