I've bought an iPhone X second hand from somebody online. The back is cracked so I purchased it for quite a lot cheaper than it's worth. The back camera works fine despite the crack and so does the front camera.
However I'm having an issue with Face ID and it's saying I can't set it up but I ran the serial number and the phone is still under hardware warranty.
Even though I didn't purchase the phone will I still be able to take it to apple for a repair.
Read more: https://iphoneus.org/faq/can-i-take-a-phone-to-the-apple-store-for-repair-if-i.html