Need to downgrade Android version.

[peanutreaper486]

I have a Samsung Galaxy S3 (SGH-I747), and it recently updated itself to Android version 4.3 JellyBean. Problem is, is that 4.3 is extremely buggy, slow, and battery draining for me.

I truly wish to revert my S3's version to <4.2, and if possible, revert it back to stock firmware (Version 4.0.4 ICS).

Is this possible? And how can I do this? I have tried googling immensely on the subject, and after browsing several XDA forums, I am back to square one.

 

[ThatVietGuy]

Honestly, if you couldn't find the answer on the XDA forum, I don't think you'll have any better luck here.

What have you found so far?

 

[peanutreaper486]

Honestly, if you couldn't find the answer on the XDA forum, I don't think you'll have any better luck here.

What have you found so far?

Several Odin exes, and many SGH-I747 firmware roms. None of them have worked in Odin v.3.04, or 3.07, with errors saying "FAIL! (Auth)".

I didn't find any answers to that on XDA either.