Most KEYone variants (especially CDMA/Verizon) have locked bootloaders that reject any modified "repack" files. To help you get back to the home screen, let me know: What is your specific model number (e.g., BBB100-1)? Were you trying to downgrade or install a custom ROM ?
fastboot continue
Open a command prompt as Administrator.
Here’s a concise review of the search/guide titled — based on common user experiences and technical fixes for this issue.
Flash manually via QFIL or qcomview :
If the phone remains stuck despite hard resets, the operating system may be corrupted.
If the menu appeared unexpectedly, you can often exit without data loss: blackberry keyone stuck in bootloader menu repack
If the device keeps returning to the bootloader menu after every restart, consider these causes:
Download and install the official BlackBerry USB drivers so your computer can communicate with the phone in Fastboot mode. fastboot continue Open a command prompt as Administrator
Repeatedly press, tap, or mash the Volume Down and Power buttons to dislodge trapped debris, dirt, or moisture.
Once the process finishes successfully, your BlackBerry KEYone will reboot out of the bootloader loop. The first boot can take up to 10 minutes as Android builds its initial system cache. Leave the device undisturbed until you see the welcome setup screen. If you want to get your phone running again, tell me: If the menu appeared unexpectedly, you can often