I have about six payments left on my Galaxy S10 and want to take advantage of Samsung offering me $550 credit towards one of their S21s. Their fine print says if I'm making equal payments, I can trade it in so long as I still continue to pay the phone off. Is this true or will Verizon hit me with paying the device fully off? I was going to use Samsung's financing since it's a better rate than Verizon's.