Originally Posted by koj
I would go back to an older version of standard rom. See if that restores imei efs back to version 1. Sammy mobile unbranded uk is version 2 so use an older version than that. I have gone back to this from version 4.3 stock. If phone boot loops after flashing do full factory reset. Then check imei. If still not ok. Install kies and it will upgrade to 4.3 and imei will be back.
Could you please post the link for the older version of standard rom? After flashing it, how can I check the IMEI EFS version? I just want to be sure I'm strictly following your tips.
Just to remind you, I got this S3 from a friend who had bought it in USA, and now I'm trying to use it in Brazil.
Thanks in advance. Greetings from Brazil!!