I'm still in limbo. For the record, I dropped off my phone at FedEx on Jan, 30. FedEx at some point said they were unable to deliver.
I contacted FedEx and they said nothing was in the package, and to file a claim. I contacted Samsung, and they said to wait for an email saying the trade-in had not been received. As of now, I haven't heard anything from Samsung on the trade-in and it's still pending.
I got a second email from Samsung support, reminding me to let them know when the trade-in wasn't received, and that if I don't respond, they will assume the matter is resolved. I haven't filed a claim with FedEx yet but I think I may have to.
The only reason I didn't file a claim with FedEx immediately is because the support rep from Samsung led me to believe it would be taken care of, once I received an email, from Samsung; saying they didn't get the device and would charge me. It's one of the strangest situations I've had with this process. It's safe to say, I won't be doing trad-ins anymore, and just sell the phones on my own. I'm glad it's worked out for most of you.