Hi I'm going to update my friends iPhone 3GS, she's still rocking 4.1. She has never synced to a computer since she bought it, an I right in thinking that due to this, I can plug into my laptop and update without her losing her contacts, SMS, settings, etc? She has no iTunes content like music, I know that would be removed if he had it. I just wanted to check i'm right in my thinking. Thanks.