I just purchased the S21 5G twice and returned my old phones for refund. My first trade in was accepted but my second one was not. They said I did not do a factory reset etc. My argument is if I didn't do a reset then return the phone to me and I will pick up postage and do the reset. But, they argued with me that they couldn't do this. They said I would have to return the original s21 to them for a refund and purchase it again and resend back the trade in. Are you kidding me. I just spent a long time at TMobile getting the S21 set up. I will not buy any Samsung items again and will advise all my contacts on facebook not to bother with the trade in program. What an inconvenience.