Note: This may result in a "Null IMEI" or "Invalid IMEI" after flashing, which will require manual restoration later. 2. Use the Latest Tool Version
The "BKF" in the error likely refers to , and "NV" refers to Non-Volatile data. When using the Spreadtrum Upgrade or Research Download tools, the software typically tries to back up existing NV data before overwriting it with new firmware to ensure the device maintains its unique identification (like IMEI) after the flash. Common causes include: spd flash tool bkf nv error
When the NV error appears, the tool checks for that signature first. If missing, it throws a misleading "NV error" instead of a "corrupt BKF header" – a known misdesign. Note: This may result in a "Null IMEI"
The BKF NV error is generally triggered by one of the following conditions: When using the Spreadtrum Upgrade or Research Download
