The international version of the Samsung (KRX:005935) Galaxy S3 that comes with the model number GT-I9300 has received a new build of the Android 4.3 Jelly Bean.The new firmware I9300XXUGMK7 is now available through Samsung Kies while users can also upgrade their devices via official over-the-air updates. If users face problems while installing the new firmware through the official channels, they can also update their devices by performing a manual installation.Users should note that the I9300XXUGMK7 firmware is an official release by Samsung, so users are not required to root their devices before manually installing the new firmware.Now, check out the manual installation tutorial for updating the Galaxy S3 (GT-I9300) to the new firmware below.RelatedGalaxy Note 2 Gets Official Android 4.3 Jelly Bean UpdateVital Points To Note- Ensure that you have proper backup for data.- Ensure that your Samsung Galaxy S3 has at least 80 percent battery power (Full charge recommended).- You must have the USB drivers for your device installed on your computer. [Download]- Enable USB Debugging.- After flashing the firmware, you will lose custom ROMs such as CM10, Paranoid Android or AOKP installed in your device.- You will also lose custom recovery such as ClockWorkMod Recovery or TWRP Recovery if you have any.- After installing the firmware on your Galaxy S3, you will lose the root if you have any as the I9300XXUGMK7 is an official firmware.NOTE: International Business Times will not be responsible for anything that goes wrong. Users should proceed at their own risk.