With a full-value trade-in, you'll be getting this phone for free.
Brad's Deals Editor Michael,
New and existing customers who trade in their current device can take up to $800 off the Samsung Galaxy S21 5G at AT&T. Opening a new line or upgrading an existing line as well as activating the phones on an Unlimited plan is required. To be eligible for the full $800 trade-in credit, you need to trade in a phone that's in good working condition and has a trade-in value of at least $95. The iPhone 8 and newer iPhones as well as Samsung Galaxy S9 and newer Galaxy phones are examples of phones that will receive the full credit. With a full value trade-in credit, the total cost of the Galaxy S21 will be covered, so you'll be getting the phone for free. Shipping is free. Sales tax is charged in most states.