Release the button, wait a few seconds, and let it restart normally.
The Fastboot screen allows you to select different boot targets using your physical hardware keys. blackberry keyone stuck in bootloader menu
If simple restarts do not work, you may need to perform a factory reset or reload the software. Release the button, wait a few seconds, and
To help narrow down the best solution for your device, could you let me know: Release the button
If you are stuck in a specific "QDLoader 9008" mode or the Factory Reset fails, your operating system is critically damaged. You will need a Windows PC and the official BlackBerry software tools.