I have a i930 quadband phone. I figured out how to remove the sim card, but what are the steps for unlocking it? I have the codes, but don't know where to start. Does the sim card need to be in the phone? and will a local (from Argentina) sim work in my phone? I assume there will be no information on the phone with the new card. How can I transfer info? I am not a techie. Are there companies that do this? I just want to be able to use my phone in Argentina locally and long distance. Should I get a Onesimcard ( a pre-paid international sim card if I will also be travelling in Peru?