Install I9300XXELKC Galaxy S3 I9300 Android 4.1.2 Jelly Bean Kies Official Firmware

Here’s how to manually install and upgrade the Samsung Galaxy S3 GT-I9300 (international version) to the nwest build Android 4.1.2 Jelly Bean. The first 4.1.2  is initially released in Poland, other countries may also follow sooner. This guide can be used by advance users only since this method is called manual flashing

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