Apple did something strange with the release of the iPhone 8 – they made the back out of glass. This was a strange decision considering the #1 iPhone repair has always been a cracked front screen. But it gets worse. They not only made the back out of glass, but glued it on so tightly that an iPhone back glass replacement is extremely difficult to perform.
Some people have resorted to using dry ice (not something we’d recommend). Alternatively, some repair shops just replace the entire back housing of your iPhone. Not only is this part expensive but it requires moving the iPhone’s internal components to the new frame – a tedious and risky thing to do. This means most repair shops either don’t offer this repair or they charge a fortune to do it.