I’m trading in my iPhone X. Took the case off and the phone only to realize the screen is lifting. I’m assuming it’s a swollen battery issue. I had an appointment with Apple tomorrow. I don’t have Apple Care, but I do have insurance through my CC company. Just looked at Sprints promotion verbiage and it says they will take the phone in any condition it just must power on and off; which it does. Just don’t want any issues when I trade my device in. I’ve always mailed my devices back with the kit. Doesn’t Sprint usually take the phone back in store as well?