I gave the return box to my husband to mail in my trade in phone and he dropped it off at the post office! I have tried calling Samsung and repeatedly tried using their chat function with no luck. Chat won't even come up. It said it has to be dropped off at Fed Ex center, not a drop box, and certainly not the post office. Has this ever happened to anyone? I also tried calling the post office but just got automated recordings. I am afraid I am out a phone and $600.