Possible final build of Android 4.1.1 leaks for Verizon's Samsung Galaxy S III
A leaked version of Android 4.1.1 for Verizon's SGS3
We would like to warn those who haven't a clue on how to install the ROM to just be patient and wait for Big Red to send you the OTA update. If you are a novice at this sort of thing, odds are that you will convert your Samsung Galaxy S III into a brick, not to mention void your warranty. Back in September, an earlier version of the update leaked with some GPS bugs which we would imagine are now all cleared up.
If you do install the update, let us know what you think. Many Verizon owners of the device are just dying to find out how smooth Project Butter makes their handset.
source: Xda (1), (2) via AndroidAuthority