Ensure you loaded the correct firmware file matching your specific model variant. Check that the phone's battery is adequately charged.
For most users, updating via OTA is the only method required.
Boot your phone into Recovery Mode (Hold Power + Volume Up while off). Select Wipe Data/Factory Reset , confirm the action, and then select Reboot System Now . Firmware ZTE Blade V40 Smart
There are two primary ways to manage and update the firmware:
What is the found under your phone's settings or original box? Ensure you loaded the correct firmware file matching
Necessary configuration files for Windows recognition.
Check the original box or look under . The ZTE Blade V40 Smart typically has a model number like ZTE 9040 or 9040N (varies by region). Do not confuse it with the standard Blade V40 or V40 5G. Boot your phone into Recovery Mode (Hold Power
Release the volume buttons as soon as the flashing tool changes status to "Downloading" or "In Progress." Step 5: Monitor the Flashing Process
| Error Message | Cause | Solution | | :--- | :--- | :--- | | | Wrong firmware for your model | Double-check the model number (9040 vs 9040N). | | "USB device not recognized" | Missing or conflicting drivers | Uninstall old drivers, use a different USB port (USB 2.0 recommended). | | "Download failed at 80%" | NAND flash corruption | Try a different PAC firmware version. Re-download file. | | "BROM error 1013" | Phone is in meta mode | Disconnect battery (if possible), wait 30 seconds, try again. | | "Authentication fail" | Secure boot enabled | This happens if you flash an unofficial firmware. Only use ZTE-signed PAC files. |
: Access technical documents and the latest ZTEOS updates at the ZTE Support Portal Firmware Version Tracking