saleem5001 Hello, for repair imei nokia, you have to enable FTM mode.
Just go to Service Tab, and select Nokia for brand, Enable FTM Mode button will be enable, just click that button, device will restart and flashing service bootloader to activate Diagnostic Port.
After Diag port active, go to service tab again, and rewrite qcn and imei as generic qualcomm.
Don't forget to leaf FTM Mode after success repair imei.