iTunes update to iPhone's carrier settings

Hello gang,

Today I plugged in my iPhone 2.0 in iTunes and here's what I got:

http://iphonemod.com.br/forum/Untitled-1.gif

And couple seconds after clicking DL and Update,

http://iphonemod.com.br/forum/Untitled-2.gif

What did it just do? Added new Carriers to iPhones supported carriers?
Couldn't that be an approach to unlock iPhone 3G?

no its not an unlock. and please use the search function!!....it has been posted before.