I updated to a Nokia 900 from a focus. I am using the same Live ID. From what I read, when I go to download an already purchased app from the marketplace to my new phone, "it" should know it was already purchased and not charge me. I can't confirm charges at this time, but there is no indication upon installation onto my new phone that it's not charging me. It goes through like it would if I were purchasing the app for the first time. Any advice, tips, etc... would be greatly apprecaited. I don't want to be billed for something I already bought.