[Completed] How to Upgrade Andriod from 4.0.4 to 4.4 on Unlocked Samsung Galaxy S3 - XDA Assist

Hello,
I bought the AT&T Locked Samsung Galaxy S3 having Android version 4.0.4 , After a while I unlocked the phone with AT&T by cancelling the contract and using local service provider and now when I try to update Android version 4.0.4 to 4.4 , its saying current software is up to date.
Can you please explain how to update Android version.

This this thread will show you how. Its a guide for retuning to stock but its the same process as upgrading, provided you pick the latest firmware to download
http://forum.xda-developers.com/showthread.php?t=2186967
Ignore anything about triangle away

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