Realme 9i Qcn File Network Fix Baseband Fix Free

If you're looking for a free Realme 9i (RMX3491) QCN file to fix network issues—like unknown baseband or IMEI null—here’s what I found:

Available QCN Files

https://www.gsmfilerom.com/ offers a couple of downloadable options:
- Realme 9i RMX3491 QCN File 1.qcn (1 MB) – uploaded on April 8, 2024www.gsmfilerom.com
- Realme 9i RMX3491 QCN File 4.qcn (1 MB) – also dated April 8, 2024
  These appear to be free and directly downloadable.
www.gsmfilerom.com has a detailed guide on using a QCN file to fix “No Service / Emergency Calls Only” and similar baseband/IMEI errors. It explains how to use QFIL (Qualcomm Flash Image Loader) to restore the device’s network calibration data with a QCN file XDAFix.com lists a Realme 9i RMX3491 QCN File for Baseband Unknown Fix, but it appears to be paid (around 1 USD)
Some YouTube videos show QCN file usage or download links, but verify the credibility carefully:
- One posted ~9 months ago shares a blog link to a QCN download (YouTube).
- Another recently (last month) features Realme 9i QCN content—possibly a tutorial (YouTube).

What Is a QCN File and Why It’s Useful

A QCN (Qualcomm Calibration Network) file stores critical network data—like IMEI, baseband settings, Wi-Fi calibration, and more. If your Realme 9i loses network functionality (e.g., unknown baseband or blank IMEI) after a reset or firmware flash, restoring a correct QCN can often fix it

How to Use a QCN File with QFIL

Here’s a standard method to restore your network calibration:

Install Qualcomm drivers and QPST/QFIL tools on your PC.
On your phone, enable Diag mode using:
- Dialing *#*#717717#*#*, or
- Running:
```
adb shell
su
setprop sys.usb.config diag,adb
```
Connect your Realme 9i to the PC—it should appear as a Qualcomm diag port.
Open QFIL, go to QCN Backup/Restore, and choose Restore.
Load the downloaded .qcn file and initiate the restoration.
Wait for a success message and then reboot your device.