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When Apple says "Update immediately," don't.
Apple update looks like Czech mate for locked-out iPhone userhttps://www.theregister.com/2026/04/12/ios_passcode_bug/
Connor Jones
Sun 12 Apr 2026 // 08:01 UTC
Lock-screen keyboard no longer accepts háček in student's alphanumeric passcode
A university student in the US is in data limbo after Apple removed a character from its Czech keyboard, preventing him from entering his iPhone passcode.(1)
Connor Byrne, 21, adopts the uncommon but security-minded approach to iPhone passcodes, using an alphanumeric string instead of the standard four-number passcode.
He updated his iPhone 13 from iOS 18 to iOS 26.4 on April 5, but in doing so lost the ability to enter his passcode. He has been locked out of the device ever since.
A university student in the US is in data limbo after Apple removed a character from its Czech keyboard, preventing him from entering his iPhone passcode.(1)
Connor Byrne, 21, adopts the uncommon but security-minded approach to iPhone passcodes, using an alphanumeric string instead of the standard four-number passcode.
He updated his iPhone 13 from iOS 18 to iOS 26.4 on April 5, but in doing so lost the ability to enter his passcode. He has been locked out of the device ever since.
Three things:
1. Back up.
2. Back up.
3. Back up.
And 4
No good deed goes unpunished.
(1) You can choose a long alpha string instead of a short pin code to unlock your device.