I have the Samsung Galaxy s10 and honestly hate it. Literally nothing against the phone. I've just always preferred Apple more. I miss my iPhone but am way past the 14 days to bring it in. So now as I understand it, I can pay off this phone to upgrade. However, I want to sell this phone to get the money to pay it off. So my question is, can I sell the phone for the price I still owe on it, then use what I make to pay off the remaining balance? I'm sorry if this question sounds dumb but I'm trying to avoid any problems.