The Bootloader is the first piece of code that runs when you turn on your phone. It tells the hardware how to start the operating system. If the KEYone detects that the system partition is corrupted, the boot signature doesn't match, or the "repack" you attempted is incompatible, it will default to the Bootloader screen for safety. Common Causes: An interrupted software update.
The most reliable way to fix a bootloader-loop issue is to completely reinstall the Android operating system using a BlackBerry "Autoloader". An autoloader is an official, executable file released by BlackBerry that contains a full factory image and the tools to flash it to your device. blackberry keyone stuck in bootloader menu repack
What (if any) shows on your computer screen when flashing fails? Have you already downloaded a specific repack file ? The Bootloader is the first piece of code
Type fastboot boot recovery.img and press Enter. Your device will boot into recovery mode. Common Causes: An interrupted software update