Earlier this month, reports revealed that some Apple iPhone users who've repaired their handset through third-party stores have had their devices bricked. In what followed, the issue was often referred to as "Error 53" after the error number displayed by bricked iPhones.
According to Apple, the error appears when a boot-time security checkup fails to recognize the Touch ID module. As per the official statement, the security check was actually designed to test the Touch ID module before a device is shipped out from Apple factories.
The company stresses that this measure was not designed to affect customers. Furthermore, those who've had to pay for an out-of-warranty replacement of their iPhone are advised to contact AppleCare to get their money back.