How do I upgrade the software of my Samsung Galaxy S2

Hi;



I have Samsung Galaxy GT-I9100 and currently Android 4.0.3 OS is running. I want to upgrade the software with latest Android one. Please guide how to do it.

via Forums de téléphone cellulaire (en français) http://cellphoneforums.net/fr/samsung/t365791-how-do-i-upgrade-the-software-of-my-samsung-galaxy-s2.html