A severely degraded battery can cause power fluctuations, forcing the phone into safe/boot modes. Solutions: How to Get Out of the Bootloader Menu
If the phone is truly frozen, letting the battery drain completely will force it to shut down, clearing the active memory. blackberry keyone stuck in bootloader menu top
Having your BlackBerry KEYone stuck in the bootloader menu is frustrating, but you have a clear path to a solution. Start with the simple hard reset, then try the factory reset, and if those fail, the autoloader is your most reliable tool. A severely degraded battery can cause power fluctuations,
A stuck, faulty, or damaged Volume Down button is the most common cause. Start with the simple hard reset, then try
Tap the Volume Down button firmly multiple times to dislodge it.
Reboot the phone. If it still fails, return to this menu and select . Note: This will erase all personal data on the device.