Umm yeah. If the remaining amount to settle the 2 year loan is $250..then once u pay that you own the phone. Once u own it, it’s yours to do whatever you want with. But you should have just started a new plan and paid off the loan on the first phone rather then doing the upgrade which requires u to return the phone. And now ur just not going to return it. And I’m sure that’s ok, but I would call them and let them know that u don’t plan on returning it and u want to pay it off and keep it. It will help avoid any problems of costs that u might not be aware of. Definitely call them and explain what ur doing.