Connect the phone to a PC. Open a command prompt and type: adb shell su setprop sys.usb.config diag,adb Use code with caution.
Check your IMEI by dialing *#06# . If it shows "Null" or "000000", your EFS partition is damaged. Restore your original EFS/NV backup using QFIL or UMT. qualcomm sim lock unlock tool fix
: Your phone's modem configuration (including IMEI, SIM lock status, and radio calibration) is stored in a file called QCN (Qualcomm Configuration Network) . Before proceeding with any unlock, use a tool like QPST (Qualcomm Product Support Tools) to perform a QCN backup . If something goes wrong, restoring this backup can often revert the phone to its original state. This is a critical safety measure that cannot be overstated. Connect the phone to a PC