Samsung Galaxy S3 ZSEMA1 uses ODIN to flash JB 4.1.2

Users of the Samsung Galaxy S3 I9300 can now flash Android Jelly Bean 4.1.2 to their device thanks to the latest firmware called ZSEMA1, the full name is I9300ZSEMA1 and is ready to install now via the official Samsung Kies or OTA straight from your smartphone. If you cannot install this new firmware then there are a few things you can do to get it, please remember this only works if you are in the region of China, Hong Kong.
This Galaxy S3 I9300 ZSEMA1 Android 4.1.2 Jelly Bean firmware apparently fixes the Exynos 4412 chipset security vulnerability as well as adds plenty more features for you to enjoy, such as Multi-Windows Multitasking like you can do on the Galaxy Note 2, it will also give you goodies such as Page Buddy, the Paper Artist App and Group Cast App.
This update will bring the new Gallery app to life on your Samsung Galaxy S3 as well as the notification panel that can be customized, you will also be able to enjoy the pleasures of disabling the brightness slider in Notification Panel and another feature includes Continues Input in Samsung Keyboard (Like Swipe or Android 4.2 Keyboard).

This new tool uses ODIN and it is this that will flash the stock 4.1.2 firmware in your Galaxy S3, we must warn you that this could delete all your personal settings and existing installed apps, you should backup your device and only use this firmware at your own risk as we here at Phones Review hold no responsibility in what happens to your handset. According to Android Jinn they say that nothing should happen to your Samsung Galaxy S3 but you are warned, if you follow the instructions via the source above you should be fine.
If you are in China and decide to install the Galaxy S3 I9300 ZSEMA1 Android 4.1.2 Jelly Bean firmware, please do let us know what you think of it?