It came to our repair shop Huawei P20 Pro with a glued back glass by Super Glue. Never, EVER use Super Glue to repair your phone. Cyanoacrylate (which is the main ingredient in Super Glue) is overly aggressive and can damage the plastic parts inside the phone as well as damage the battery which can cause an explosion. This time it was done without major damage and apart from the slight damage to the plastics, nothing serious happened.