To find out more about how the Touch ID fingerprint scanner works, visit our Inside the iPhone 5s Touch ID scanner article. Update iOS (or macOS) ...

For screens that are visibly broken or shattered, read How to repair a cracked iPhone or iPad screen. We have related advice in How to fix an iPhone that won’t turn on.

Apple MacBook seems to be having an issue when you use a scanner. Now, Apple confirmed it is a bug and released a guide fix.