When you trade in your old phone with T-Mobile, you'll get it for free. New and existing customers can swap an old device in any condition for a new Galaxy S25+ for free, or use the credit for up to $1,000 off other models like the top-of-the-line Samsung Galaxy S25 Ultra (delivered as 24 monthly credits on your bill).

Samsung has kept its generous trade-in program for the Galaxy S25 series even after the pre-order period is over, with values up to $900 for select devices toward the Galaxy S25 Ultra. This shows an increase from the $750 offered for the Galaxy S24 Ultra, as reported by 9to5Google.