in qatar, 3G setting for iphone 3G is not given automatically, you need to edit the proxy.pac file in your iphone first.. (you need to access your file in the iphone by ssh-ing or using iphone file browser)

or you can wait for vodafone because they will be the official carrier of iphone when they open in doha..(well hopefully this year..)

team applei.ph < www.applei.ph >
For your iphone needs! :P