The iphone unlock application yellowsnow developed by the dev team allows you to do this

hey guys.. thanks for helping...i want to buy a unlocked iphone, that is that i couls use with my current sim card, will this iphone bought from the apple store, i think that is at&t iphone, will it come unlocked... and i could use it right out of the box?


i will like to know what companys support sim cards now days in the states...

thanks for all the help, and helping me invest my money in the right way