Apple iPhone 6s - 16 GB - Space Gray (Unlocked, Screen Doesn't Respond To Touch)

Phone charges fine, turns on good, and  is in good condition. Screen does not respond to touch. Only the side buttons appear to be working. I am not an IPhone user, so if this is an easy fix, than even better for the buyer, as I have not tried anything other than charging it. Comes with box, instructions, and stickers. Thanks for looking!