It appears FedEx stole my trade in phone. I traded in my S21 Ultra and was required to ship it by 3/18. I took it to FedEx on 3/16 where it was scanned in for delivery to Samsung. Having heard nothing from Samsung about receipt of the phone and having not received confirmation of delivery by FedEx, I called FedEx this morning to get the status of the package. They told me there was no record of activity after the initial scan on 3/16 and that the package was "lost." Told me I needed to contact Samsung. I was bracing for a struggle with Samsung about the $850 credit I was supposed to get for the trade in. Thankfully, the process was a breeze. Went to the Samsung website and initiated a chat with a rep. Gave the info about the order, trade in and the convo with FedEx and in about 15 minutes I received an email from Samsung that the issue is resolved and they would not charge me back for the missing trade in phone. Whew.