I have an iPhone 3GS, synced with a laptop that has now died. I'm now sharing a laptop with my friend and she has her iPhone synced with it.
I want to sync my iPhone with her laptop without losing my data, then reload my stuff onto my new iPhone 4.
Please explain how I can have two seperate iTunes accounts for each phone, because we don't want each others' stuff. Also, please explain how I can sync my old iPhone so i can sync my new iPhone.