Apple Works on Fix for iPhone Passcode Bug Linked to Missing Czech Keyboard Character

Apple is reportedly developing a software fix for a frustrating iOS 26 bug that has left some users entirely locked out of their iPhones for months.

According to a recent report by The Register, Cupertino’s software engineers are scrambling to patch a keyboard interface flaw that inadvertently removed a specific special character necessary for unlocking devices configured with custom alphanumeric passcodes.

The issue first gained public attention when a 21-year-old university student, Connor Byrne, shared his predicament on Reddit.

As The Register reported, Byrne opted not to use the standard four- or six-digit PIN on his iPhone 13. Instead, he enhanced his device security by setting a complex, custom alphanumeric string as his primary passcode.

While cybersecurity professionals highly recommend complex passcodes to thwart brute-force attacks, Byrne’s specific password combination triggered an unexpected software trap.

He utilized the caron or háček (ˇ) symbol from the iPhone’s Czech keyboard layout. When Apple released iOS 26 to the general public in September 2025, the company unknowingly removed this specific character from the lock screen keyboard.

Without the ability to type the required symbol, Byrne was permanently locked out of his smartphone. The only native solution provided by the device was a full factory reset.

However, a reset would permanently erase months of valuable photographs and personal files stored locally on the device. Choosing to preserve his data, the user has remained locked out while waiting for a potential software patch.

Following the viral social media post, Apple’s internal engineering team reportedly began investigating the issue. The Register notes that Apple is now working on a targeted fix to restore the missing character, which is expected to roll out in an upcoming major iOS 26 release.

Interestingly, despite Apple’s engineers responding within 9 days after the issue surfaced online, the extended lockout has permanently damaged the user’s trust.

According to The Register, Byrne has decided to migrate to an Android device, specifically eyeing the Samsung Galaxy S26 Ultra.

He cited both the software quality assurance oversight, noting that the current keyboard’s flaws duplicate characters side-by-side, and a preference for alternative camera hardware. Apple has not yet issued an official public comment on the fix’s timeline.

• Backup Data Regularly: Always maintain up-to-date iCloud or physical backups. If a critical lock screen glitch occurs after an update, you can safely perform a factory reset without losing your data.
• Review Custom Passcodes: If you use a custom alphanumeric passcode, ensure it relies on standard characters that are universally available across different keyboard layouts to avoid getting locked out.
• Monitor Software Updates: Be cautious when adopting major operating system upgrades immediately upon release. As this incident highlights, unexpected interface bugs can temporarily sever device access.

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