7) The phone will lose root once official firmware is installed. 8) This stock official firmware is compatible only with Samsung Galaxy S3 LTE GT-I9305.

Step 1: Download Android 4.1.2 XXAMD6 Jelly Bean official firmware for Galaxy Grand Duos I9082 and Odin v3.07 on your computer.

Here's a tutorial for installing Android 4.2.2 Jelly Bean firmware updates, region by region, for the Samsung Galaxy S4.

Here is how to install the Android 4.4.2 KitKat XXUFNB7 official firmware update manually on the Samsung Galaxy S4 GT-I9500.