Check all ports and buttons.
Don’t forget to give the device a full look over, and this includes checking the functionality of all ports and buttons. Because let’s be honest: without the ability to charge your iPhone via the Lightning port, the device is as good as a brick. Be sure to use an MFi-certified Apple charger to test the phone’s charging capabilities.
You’ll also want to test the volume buttons, speakers, and home button, especially if the device has Touch ID.