: Re-verify that your phone model is exactly BD3. Check the sticker under the battery or on the original box. Device Not Recognized (No Bar Appears)

. Press and hold either the or Volume Up button (depending on your specific revision's hardware key combo for BROM mode), then connect the phone to the computer using the USB cable.

Use a high-quality, stable USB cable. Avoid loose ports, as a disconnection during low-level flashing can permanently hard-brick the device.

Modern Tecno devices utilize secure boot protocols. This security measure prevents unauthorized software from being installed, which can lead to common errors like: "Status DA Hash Mismatch" "Secure Boot DA Required"