Install I9300XXUGMJ9 Samsung Galaxy S3 I9300 Official Android 4.3 branded/unbranded firmware

For those who might not already known that the Samsung Galaxy S3 international variants (GT-I9300) has already received its official Android 4.3 Jelly Bean upgrade. The upgrade firmware came around as build number I9300XXUGMJ9, and this brought me up some doubt why the heck in the world happened that it is

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