In the most countries you can't buy the Galaxy S III yet.
We of SamMobile like to give you the first customer guide!
This will help you out if you don't know how to set your settings for email, wallpapers, contacts ect.
If you want to read this guide you need to have Powerpoint!
This guide is based on firmware I9300XXALE9 which is the latest rom at the moment!
The guide date is 25th of May.
You can download the guide here.
Have fun with the 4th version!