Samsung Galaxy S3 — SGS3 - Android version

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Jun 26, 2014 10:06:21 PM via Website

I have SGS3 with 4.1.2v, not rooted or anything. I would like a new software and I saw a lot of bad things about the newer version 4.3. What should I do?

Jun 27, 2014 4:23:16 AM via Website

required root for this procedure
first you need to backup EFS folder from 4.1.2 which stores the IMEI number and serial number . After upgrading to 4.3, you cannot downgrade
Here EFSv1 change to EFSv2 ,so downgrading will damage the IMEI . you can downgrade if you have the 4.1.2 EFS backup .

why downgrading

4.3 has lot of bugs and has a huge battery drain problem.

Ready To Help You.

Jul 1, 2014 11:18:24 AM via Website

When I connect the phone to PC, Keis says that there is a new version. But from what u said I should better stay with 4.1.2