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Confirm and you will enter the download mode.

Press and hold these three keys: Home, Volume Down and Power Button.

Step 5: Boot your device in download mode as so: Step 4: Unzip Odin and run the file Odin3_v3.04.exe as administrator Step 2: Unzip the downloaded package in order to obtain this file: I9300XXUFME3_I9300OJKFME1_5 Step 1: Download the zip package containing all the files you will need: Click here Here is how to download and install Android 4.2.2 for Galaxy S3 codenamed I9300XXUFME3:

Please exit Samsung Kies if it is running in the background.

If it’s not enabled, make sure you enable it and

Your phone should have USB Debugging enabled.

If you want, you should and must backup all your data including contacts and messages.

This is ensured by having Samsung Kies installed on your computer

Make sure you have all the necessary drivers installed.

You need to ensure the following things before you being updating your cellphone to the leaked version of the Android 4.2.2. The firmware can be installed using Odin and the details of the firmware are as follows: If you want to know how it might look like on your device, you can download and install this leaked update if you so wish. Please know that this is an early release of the firmware so it is a test release and not the final version with the latter being released sometime in the near future. It is now available for download updating the Galaxy S3 I9300 to Jelly Bean 4.2.2 JDQ39.

The official version of Android 4.2.2 was leaked a while ago for Galaxy S3 I9300 codenamed I9300XXUFME3.