Use a high-quality USB cable (preferably the original factory cable). Connect it directly to a motherboard port (USB 2.0 is highly recommended over USB 3.0 for stability).
: Obtain the specific firmware (Stock ROM) for your BQ model. Note that the official BQ website is no longer active, but archives like the BQ Firmware Collection on GitHub host original files for the M and E series. Battery Level : Ensure the device has at least 40% charge to prevent it from shutting down mid-process. 2. Step-by-Step Flashing Instructions Launch the Tool : Open the extracted SP Flash Tool folder and run flash_tool.exe Administrator Load the Scatter File
This setting resets after a normal reboot. Only perform flashing procedures immediately after following these steps.
Flashing DX340: QFIL Guide & Troubleshooting | PDF | Usb - Scribd
The progress bar at the bottom of SP Flash Tool will turn red, then yellow, indicating that the firmware is transferring. bq firmware flash tool windows 10
Download and install the official BQ drivers or the universal MediaTek/Qualcomm VCOM drivers onto your computer. Launch the driver setup file, accept the Windows security prompts warning you about unsigned software, and complete the installation wizard. Step 2: Download the Required Files You need to acquire three essential software packages:
, power off your phone, and connect it via USB. You may need to hold Volume Down for detection. green ring will appear once the process is successful. 4. Flash Qualcomm Devices These devices typically use QFIL (Qualcomm Flash Image Loader) or a provided fastboot script. How to use QFIL to flash Qualcomm (QLM) firmware
Before you begin, ensure you have the following ready to prevent interruptions:
Windows 10 strictly blocks the installation of unsigned third-party drivers by default. Because older BQ and MediaTek USB drivers lack modern digital signatures, you must temporarily disable this security feature to install them. Use a high-quality USB cable (preferably the original
Once the tool shows a success message or a green checkmark, the flashing is complete. Disconnect the phone.
Option B: Qualcomm Flash Image Tool / QFIL (For Qualcomm-powered BQ Devices)
Swap out the USB cable, switch to a USB 2.0 port instead of USB 3.0, or try holding the Volume Down button while plugging the device in to force driver recognition. Error: PMT Changed for the ROM
If the drivers are installed correctly, the tool will automatically detect the phone and begin flashing. You will see a yellow progress bar at the bottom. Note that the official BQ website is no
The BQ Firmware Flash Tool is a specialized utility developed to communicate directly with the chipsets used in BQ devices (primarily MediaTek and Qualcomm processors). It allows users to write official firmware files directly to the device's internal storage, bypassing the standard Android user interface. Key Functions:
Connect your device to the PC using a high-quality USB cable (preferably using a USB 2.0 port, as USB 3.0 ports can occasionally cause interface issues during fastboot scripts).
You need three essential components on your Windows 10 PC before you begin. Place them in a dedicated folder on your Desktop for easy access.
: Designed specifically to flash manufacturer-supplied stock ROMs.
Unzip your downloaded drivers and locate the configuration file (usually ending in .inf ) or the executable installer ( .exe ).