be very careful if u buy used iphones, there are many things to check if the iphone is legit or not

below are the list of things that can happen when u buy a used iphone

1) screen crack before, changed with OEM screen, face id and true tone wont work
2) back glass crack before, changed with OEM back glass
3) telco set
4) US set with no sim card slot, only esim, a mod is performed to add a sim card slot into the US set iphone, it involves cutting into the body of the iphone
5) battery changed with non original battery

its not easy to find a used iphone that dont have any of the problems listed above