: Hold the Power button for at least 20-30 seconds to force a hard cycle.
BlackBerry KEYone Go to product viewer dialog for this item.
: Press and hold the Volume Down and Power buttons simultaneously for about 10 seconds until the device vibrates and restarts. Common Causes for Being "Stuck"
: This keeps you in a similar state for advanced debugging and won't help you exit unless you plan to use a computer to fix it. Common Fixes for a Stuck Bootloader