a QCN file is a Qualcomm Calibration Network file. It is a binary file containing all of the calibration information for the device’s many elements and sensors, such as the WIFI, radio, GPS, IMEI, and touch screen.
The QCN file stores the device’s radio and network configuration parameters, including the IMEI number, baseband version, and other critical data. If these configurations are lost or corrupted, such as after a firmware update or as a result of other system-level problems, it can be used to restore them.
Requirement:
- QPST Here
- QCN Rebuilder
- pixel5 tested QCN: Download
Steps to Repair IMEI Number on Pixel 5:
Experimental method=
- Flash engineering ROM
- download require files from above
- Run QCN Rebuilder and select downloaded QCN file
- & rebuild qcn
- Now Enable usb debugging and connect Phone to PC
- Send the below code via CMD
Reset EFS Partition:
adb reboot bootloader fastboot erase modemst1 fastboot erase modemst2 fastboot erase fsc
- flash modemst1 modemst2 fsg & fsc (available in firmware or use readback) via fastboot
fastboot flash modemst1 modemst1.img fastboot flash modemst2 modemst2.img fastboot flash fsc fsc.img
- Enable Diag Port:
adb shell su setprop sys.usb.config rndis,diag,adb
- Run QPST/QFIL. Go to restore tab and select the Rebuilded QCN file & click restore
- Now repair IMEI with any supported tool
Method 2:
- use with supported box or dongle
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