Oppo A31 QCN File

Oppo A31 QCN File – Network Calibration & Baseband Fix

Flashing the QCN file on the Qualcomm-based Oppo A31 (2015 / A31c / A31t / A31u) restores corrupted NV (Non-Volatile) memory data, resolves "No Service" / "Searching for Signal" errors, and repairs invalid, missing, or null IMEI and baseband configurations.

Note: This QCN file is exclusively for the Qualcomm Snapdragon 410 (MSM8916) edition of Oppo A31 (2015). The 2020 Oppo A31 (CPH2015) uses a MediaTek (MT6765) processor and relies on NVRAM/NVDATA instead of QCN.

File Information

• Device Model: Oppo A31 (2015) / A31t / A31c / A31u

• Chipset: Qualcomm Snapdragon 410 (MSM8916)

• Function: RF NVRAM repair, Baseband restoration, Cellular network fix

• Download Link: Oppo A31 QCN File

Requirements

• Windows PC with installed Qualcomm HS-USB / Diag Drivers.

• QPST Tool (Qualcomm Product Support Tool).

• Target handset with USB Debugging enabled.

Restoration Steps

1. Enable Diag Port: Connect your device to the PC and switch on Qualcomm Diagnostic mode (dial *#801# / *#9434# or execute adb shell setprop sys.usb.config diag,adb via root shell).

2. Verify COM Connection: Open QPST Configuration and ensure the active Qualcomm Diagnostics COM port is recognized under the Active Phones section.

3. Open Restore Tool: Navigate to Start Clients > Software Download, then switch to the Restore tab.

4. Load QCN File: Click Browse next to the QCN File field and select your downloaded Oppo A31 QCN File.

5. Flash Network Data: Check the box for Allow phone / file ESN mismatch, click Start, and wait for the restore process to reach 100%.

6. Reboot: Disconnect the USB cable and restart your handset.