The Samsung Galaxy S3 Android 4.1.1 JellyBean update has commenced its rolling out for T-Mobile customers in the USA this week.

It has been reported that the upgrade is now available for the SGH-T999 Galaxy S3 model.

T-Mobile customers have been advised that they can access the update through Samsung KIES or OTA over-the-air.

The Android 4.1.1 JellyBean update has some significant changes to the software including Google Now and Project Butter.

The update will improve the frame rate and performance of the cell phone, making visuals a much smoother experience.

In further news about the Jelly Bean upgrade, it has been reported that AT&T and Verizon customers should also receive the update sometime in the next two week.

The update has already begun rolling out to Sprint users from the first of this month, although the complete roll out could take weeks to filter through to all users.

The Android 4.1 JellyBean update for Verizon users has already been leaked in the form of a new ROM. This indicates that Verizon will be rolling out the official update soon, so most customers may decide to hold on for the OTA version rather than the new ROM.

The Galaxy Note 10.1 JellyBean update is also now available in certain regions. The device initially launched with Android 4.0 Ice Cream Sandwich, but the Jelly Bean update should bring major enhancements, such as improved performance, new S Pen functions, Quick commands, Pop Up Play, and new Mini Apps.

Tags: samsung galaxy s3 jelly bean 4.1