Hello, I have an AT&T iPhone 4s. I am going to be in London and Russia for the next 2 months, and so wanted to unlock the phone so as to be able to use UK and Russian SIM cards. I first thought I needed to jailbreak it (per the article on Gizmodo in April about unlocking the 4s), but searching thru the forum, it seems that jailbreaking and unlocking can be independent. Do I need to jailbreak the phone to unlock it? What are the best and easiest ways to unlock the 4s? Any solutions that would be free and/or minimize information sharing with third parties would be particularly valued.