iPhone Error 53
Error 53 is the error code that some iPhone 6 owners have received after third-party repairs that affect Touch ID were made to their iPhones, rendering the devices unusable. iPhone to fail a Touch ID validation check because the mismatched parts are unable to properly sync. Parts that can impact Touch ID include the screen, flex cable, and Home button.
What is iPhone Error 53
When this Touch ID validation check fails during an iOS update or restore, Apple disables the iPhone, effectively bricking it in an effort to protect Touch ID and the related Secure Enclave that stores customer fingerprint inf`ormation.
Error 53 is an unfixable error code displayed by iTunes when restoring an iPhone that is found to have an unidentified or unexpected Touch ID module.The update restores iPhone disabled by Error 53, and will also prevent future iPhones that have either the Touch ID home button or the cable replaced by third-party from getting bricked.
Apple says that the reason for Error 53 is security. Touch ID is a fingerprint sensor designed to help keep your iPhone secure and to allow you to make secure mobile payments, so when Apple detects that an iPhone has an unauthorised Touch ID sensor installed it deems the iPhone unsafe and essentially kills it.
If you’re concerned about Error 53, don’t panic. It’s unlikely to occur unless you’ve had your Touch ID fingerprint sensor replaced, and even then it should only happen if you update your iPhone or restore it, so as long as you don’t install a system update or restore your device from a backup you shouldn’t see Error 53.