Talk:Baseband Commands

i bought an iphone from 2weeks with baseband 02.30.03 and bootlooder 6.2 and i need to unlock it to work with vodafone sim card need you'r help plz find me a sulution to unlock or downgrade my baseband so i can use yellowsn0w I am having trouble figuring out how to run these commands on my iPhone 4. I meam minicom does not work. i saves and all but it wont let me see what command im typing and it says "offline" in the bottom.