Official Jelly Bean Stock Firmware for Galaxy S3 i9300! [UNROOT]
Your long wait is over, official Jelly Bean stock firmware is now available for your Galaxy S3 GT-i9300. (Please DO NOT FLASH on U.S./Canadian GS3s!!!)
This first official Jelly Bean stock firmware is for Poland GT-i9300 but it is compatible with any GT-i9300 models and does come with all the languages (as shown in installation video below).