Flashing is typically initiated with the phone powered off. Connecting it via a high-quality USB data cable while holding specific keys (like Volume Down) triggers the "handshake" between the PC and the tool. Recovery and Common Troubleshooting
– Device recognized in fastboot/bootloader mode consistently. USB debugging enabled – no disconnects during flash. bq firmware flash tool windows 10
Technical Guide: Flashing BQ Smartphone Firmware on Windows 10 Bq Firmware Flash Tool Windows 10: A Comprehensive