Depends on how you look at it, T-Mobile requires that all phones that are Jumped remain in good condition so that they can be resold at a good discount to others or shipped off to their phone insurance company to be issued out to people whose similar phone broke and they make a claim

So it's not like they get shipped back and thrown away, and I do always have the option to just not return the phone and continue to make the payments on it and then I can pass it down to a family member or just keep it as a backup. Which I have done in the past.