The entering the Bootloader Menu (often called the "Backup Bootloader" or "Fastboot" mode) is a specific state where the device waits for external commands from a computer. This usually happens due to accidental button presses during a restart or a software "boot loop". Quick Exit Strategy
On the BlackBerry KeyOne, the bootloader menu looks like a minimalist black and white screen with a few numbered options:
The safest way to restore a "repack" firmware state is through the official TCL Mobile Upgrade application. It automatically fetches the correct, signed factory files for your specific sub-model. blackberry keyone stuck in bootloader menu repack
From bootloader menu, use volume keys to select → Press Power. If recovery appears:
Choose KEYone (or its TCL internal code) from the dropdown list. The entering the Bootloader Menu (often called the
After successful flash:
button for approximately 15 to 30 seconds. This forces the device to power cycle and attempt a normal boot. Select "Start" Volume Up/Down It automatically fetches the correct, signed factory files
(Mac/Linux are significantly more difficult for this specific process).