If you’re not familiar, Error 53 happened when devices with new Touch ID sensors from unauthorized Apple repair shops — using components not sourced properly — failed fingerprint scans.
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When the new Touch ID hardware was used, it caused iOS to freak out; it could tell the components weren’t original, and thus shut the phone down entirely as a safety precaution.
Speaking to TechCrunch, Apple released the following statement:
Some customers’ devices are showing ‘Connect to iTunes’ after attempting an iOS update or a restore from iTunes on a Mac or PC. This reports as an Error 53 in iTunes and appears when a device fails a security test. This test was designed to check whether Touch ID works properly before the device leaves the factory.
Today, Apple released a software update that allows customers who have encountered this error message to successfully restore their device using iTunes on a Mac or PC.
We apologize for any inconvenience, this was designed to be a factory test and was not intended to affect customers. Customers who paid for an out-of-warranty replacement of their device based on this issue should contact AppleCare about a reimbursement.
The update for iOS 9.2.1 can be obtained via iTunes Connect; you won’t be able to do it over the air.
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