How to update Samsung Galaxy S3 to Android 4.3 and (back to stock)

First of All preparation :

Download this files first of all

Download Firmware from here select your country from list

Tool from here

USB drivers here

1 : Install usb drivers and restart your computer

2 : Extract all zips

3 : Run Odin3 v3.07

4 : put your phone into DOWNLOAD MODE by process

Turn off your phone

Press Volume down + home button + power button then press volume up to continue

5 : connect your phone with computer which is shown as "0:[com x]"

6 : click on PDA and select firmware file where you extract

7 : Click on start and wait till complete

8 : after you see PASS disconnect your phone from pc

Enjoy Official Android 4.3

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