: Go to Settings > About Phone and tap Build Number seven times to unlock Developer Options. Then, enable USB Debugging in the Developer Options menu. Connect to PC : Plug your phone into your computer via USB.

| Command | Effect | | :--- | :--- | | fastboot reboot | Restart the phone normally. | | fastboot reboot recovery | Boot into Huawei eRecovery. | | fastboot oem device-info | Check bootloader status (Locked/Unlocked). | | fastboot getvar vendorcountry | Check region (e.g., hw/eu). | | fastboot erase userdata | Factory reset (if bootloader is unlocked). |

: Connect one end of your Micro USB cable to your computer.

If you have followed all the steps above and your HUAWEI BAC-L21 still refuses to enter Fastboot Mode, you may have a hardware issue (stuck button) or a corrupted bootloader. In that case:

This device comes with Huawei’s EMUI skin layered over Android. Historically, Huawei devices have a very specific method for entering alternate boot modes compared to stock Android devices (like Google Pixels) or Samsung devices. The BAC-L21 utilizes a hardware key combination that requires precision and timing.

This is the primary and most reliable method for the HUAWEI BAC-L21. This method works even if the phone is turned off, making it ideal for situations where the Android OS is corrupted.