A while back I got an Iphone X as part of an upgrade and I absolutely hated that phone. After a few months of working out all the kinks and issues I had with it. I decided to pay to upgrade again early and go back to an Iphone 8 plus. Now I'm being charged for the rest of the cost of the X because it wasn't fully paid for. Since I am being billed for the phone, can I not just sell it for it's value and use that money to pay it off? I can't return the phone because no store will take it and I drive an 18 wheeler for a living and shipping something from a truck stop is rarely possible and often not safe. Any advice will help. TIA
