Updated Big Red GS3 to 4.1.2, got the dreaded "System Software not Authorized by VZW" message...help

I have a rooted, stock GS3. Waited a few hours for others to update to 4.1.2 and someone said they used Voodoo Rootkeeper to temp unroot, updated, and everything was fine. I did this also, and my phone updated and rebooted. But now it says "secure fail: kernel" in the upper left of the screen and there is a big message on my screen that says, "system software not authorized by VZW has been found on your phone. Please turn off your phone and go to the nearest VZW store for help." Can't get anything to load now. I have been regularly backing up data via Titanium Backup.

Can someone tell me why this happened and how to fix, please? I'm not super familiar with flashing back to stock or anything (hoping there's a better option anyway), but I would appreciate all the keep I can get. :)

EDIT: Should have done a bit more digging on this site, I'll admit -- following steps[Only registered and activated users can see links. Click Here To Register...] to flash back to stock with Odin now. Guess that'll have to do.

Sounds like you may have to use Odin to get your phone back to life.

Are you able to get into recovery?

Update: Found the non-wipe stock rom of 4.1.2 and am fully functioning again! WITH the latest update. [Only registered and activated users can see links. Click Here To Register...]

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Yep, got it! Posted my saving grace link below. Thanks anyway!

Quote:

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Originally Posted by JoePaLives84 [Only registered and activated users can see links. Click Here To Register...]

Update: Found the non-wipe stock rom of 4.1.2 and am fully functioning again! WITH the latest update. [Only registered and activated users can see links. Click Here To Register...]

- - - Updated - - -

Yep, got it! Posted my saving grace link below. Thanks anyway!

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But that is NOT the current release. The new one is VRBMB1.

A rooted version is posted but I am going to wait a bit before trying it:

[Only registered and activated users can see links. Click Here To Register...]

I had the same problem. I booted into download mode and canceled, phone rebooted without problem. It showed update as failed, yet the version indicated a success.