I have a Iphone 5s and there's a crack on the back of the phone. I have T-mobile can I still Jump?

I have a Iphone 5s and there's a crack on the back of the phone. I have T-mobile can I still Jump?

Um… If the phone WORKS… Who the hell cares?

You have to ask T-Mobile about that. If the phone is in working condition and you've paid 50% price of the phone, you're eligible for trade-in. But as you say the phone has physical damage so it's up to T-Mobile to consider.