Samsung’s prediction that its Android 4.3 Jelly Bean firmware would be rolling out for the Samsung Galaxy S4 by the end of October has been accurate, with leaked info heralding the release of the real McCoy.

To begin with, Samsung Galaxy S4 owners in Germany will be pioneering the upgrade which will roll out all over the world by the end of 2013.

So what will we get in this latest update?

There will be OpenGL 3.0 support along with Galaxy Gear smartwatch support, Trim support and Ant+ support.

Samsung have also popped in the Knox Implementation of the bootloader and dedicated application and the Samsung Wallet is also featured.

There will be improved RAM management and a much sharper display with far better colour reproduction as well as an improved TouchWiz launcher which will solve lag problems with fewer redraws.

For keyboard warriors there’s a new keyboard as well as a new Samsung browser with a full screen by default and new tab interface.

A new reading mode will optimise display for reading and for the snap happy there’s welcome new camera firmware.

A few other tweaks have been made to the contacts app and the flashlight widget.

The result of this 4.3 upgrade is that Android performance will be heaps better, with benchmarks up by 20%, which is a significant amount.

You can download the update via Odin but if you do, you will invalidate your warranty so you may want to be patient.

At the moment the 4.3 update is only available for the 19505 Galaxy S4 LTE-enabled model with Snapdragon 600. SamMobile says the octa-core 19500 will be out next week and the Galaxy S3 expected to get the update next month. It looks like December for the Galaxy Note 2.

Delays are due to the number of S-Pen features that have to be moved to the new Android update.

You’ll be able to download Android 4.3 to the Galaxy S4 over the air and if you want to check when it’s available for your device, you can have a look manually in Settings>More>About device>Software update.