If you did not make any backup of your EFS folder, and your IMEI is messed up, this could be your solution to recover your lost IMEI. NOTE THAT AT LEAST YOU MUST HAVE THE SHIPPED ORIGINAL EFS FOLDER ON YOUR PHONE ( even if you didn't make a backup...
For the purpose of making a backup of the EFS folder, how about simply copying the whole folder into a safe place?
There is an app called Nitrality (if my spelling is not wrong) which one of its various functions is to backup and restore the E...
I do not have the .nv_data file. onle *.bin or *.bak. Any suggestions or do I have to stick with the generic 00... IMEI? The whole procedure did not word for me, but thanks anyway.
By the way I think you do not need adb for that. You can execute...
Had you already made a copy of your EFS folder before your IMEI was changed?
No, I didn't had the back up before IMEI change.
To make a conclusion:
... You didn't backup your EFS folder.
... Your IMEI changed because of ROM flashings.