Blackberry Keyone Stuck In Bootloader Menu Top -

If the basic steps fail, you may need to reload the operating system: KeyONE stuck on the Fastboot menu - CrackBerry forums

Getting your stuck in the Bootloader Menu (often labeled as the "BlackBerry Backup Bootloader Menu") is a common but frustrating issue, typically triggered by corrupted firmware, a jammed physical button, or a critical battery failure. Review of Root Causes blackberry keyone stuck in bootloader menu top

This is a common issue with the (and other BB Android devices). The “bootloader menu” you’re seeing is likely the fastboot mode screen (often showing “BL: XE24.XXX” or similar at the top). It usually happens after a failed system update, low battery during boot, or a corrupted cache. If the basic steps fail, you may need

A common cause for entering the bootloader automatically is a stuck Volume Down button or a tight case pressing against it. Remove any case and "mash" the volume buttons to ensure they aren't physically jammed. It usually happens after a failed system update,

Hold Power + Volume Down for about 10–15 seconds until the screen goes black and the phone vibrates, then release. It should reboot normally.