Apple's "iPhone Unavailable" lockscreen message appears after too many incorrect passcode attempts, a security feature designed to block unauthorised access that can just as easily be triggered accidentally, such as by pocket presses or a forgotten passcode. Engadget has outlined several ways to regain access, with the best option depending on the iOS version installed, whether the passcode was changed recently, and what other devices are available to help with recovery.

Users on iOS 17 or later who changed their passcode within the past 72 hours can simply revert to their old one via the "Forgot Passcode" option after five failed attempts. Those without a recent passcode change can erase the iPhone directly on the device, provided they are running iOS 15.2 or later, have Find My enabled, an internet connection, and their Apple Account password, though this wipes all data unless an iCloud backup exists. Alternatively, the phone can be connected to a PC or Mac and restored via the Apple Devices app or Finder using recovery mode, again requiring an existing backup to recover data afterwards.