Download Android Jelly Bean 4.3 stock firmware for Samsung GT-i9300 Galaxy S3 smartphone

Download Android Jelly Bean 4.3 stock firmware for Samsung GT-i9300 Galaxy S3 smartphone from here or here. Download previous firmware from here.

Firmware details
Archive name: SAMSUNG_I9300_4.3_20160323
Image: SAMSUNG_I9300_SJJL_ROM_20160323C
Archive file size: 543 MB
Support: Samsung Exynos 4 Quad 4412 
Build number: m0zn-user 4.3 JSS15J I9300ZNUBML1 release-keys

Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data. 


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