Load the original QCN file you backed up during Phase 2. If that file was entirely corrupted, you must download a verified matched exactly to your phone’s baseband version.

IMEI repair process typically addresses issues such as a "null" or corrupted IMEI, which often occurs after a failed firmware update or hardware repair. For the

Physical or thermal damage to the eMMC/UFS storage chip where the security partitions reside. Critical Prerequisites Before You Begin

The , better known as the Oppo A9 2020

Input the device’s original and IMEI 2 into the tool's designated fields (matching the sticker on the back of the phone).

In your servicing software (e.g., UMT QCFire or UnlockTool), go to the tab.

In the phone settings under "About Device", the baseband version shows as "Unknown". Primary Root Causes

Note: If the device is not rooted, you may need to use hardware test points (EDL mode) or specialized service codes in the engineering menu ( *#801# or *#9434# ) depending on the ColorOS software version.

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