Yesterday, the first Android 4.3 test firmware for the Galaxy S3 made its way on the Internet. Less than 24 hours later, Samsung has started rolling out the official update for Galaxy S3 owners across the world, starting with Ireland first.

The update brings a lot of new features and enhancements including TRIM support, which should greatly improve performance. Below is an unofficial change-log of the update via SamMobile -:

• GALAXY GEAR Support

• TRIM Support (Makes the device much faster)

• ANT+ Support

• Core UI elements updated to the ones on the Galaxy S4 (Galaxy S4′s theme all over)

• New Samsung Keyboard

• GPU drivers have been updated (Higher GPU benchmark scores)

• New Lockscreen: Multiple Widgets, improved ripple effect than Android 4.1.2, ability to change clock size and set a personal message

• New Screen modes (From S4): Adapt Display and Professional Photo

• Daydream

• Driving mode Actionable notifications

• Move-to-SD-card feature

• New Camera mode : Sound and Shot

• New Additions in Notification Centre

• Completely revamped Settings UI (Tabbed interface – Galaxy S4)

• Implementation of Voice controls (Let’s you control various parts of the phone using voice commands – Galaxy S4 feature)

• New Samsung Apps: Calculator, Clock, Contacts, Gallery, Music

• Full screen Samsung apps

• New S-Voice (from Galaxy S4)

Samsung should slowly expand the roll-out of this update to other regions of the world. The company is also expected to start updating the US variants of the S3 towards the end of November.