Before flashing a new QCN, you should try to restore your own data:
If you want, I can:
A QCN (Qualcomm Calibration Network) file contains critical NV (Non-Volatile) items specific to Qualcomm-powered devices. It stores radio frequency calibration data, network bands configurations, and the unique IMEI numbers of your device. oneplus 7t pro qcn file top
Look at the top menu bar, select , and open the Software Download utility. Switch over to the Restore tab within the window. Before flashing a new QCN, you should try
Navigate to the top dropdown menu and click on QCN NV Backup/Restore . Browse and select your edited .qcn file pathway. Switch over to the Restore tab within the window
If your IMEI is restored but you still cannot connect to a network, your network partitions might be locked. You must use a terminal emulator on your rooted device to completely wipe the corrupted EFS blocks before attempting the QCN restore process again. Execute these specific commands in ADB shell as root:
: Rebuilding the software link to your device's unique identification numbers if they show as "0" or "Null".