I will be getting the iPhone 4 from AT&T within the coming weeks. I will also have the 200Mb data plan. I have Wi-Fi at home and at my vacation home. My uses will be: Checking Facebook constantly. Using GPS on the week ends. Very minimum web browsing and YouTube videos. No music streaming. Will only download songs on Wi-Fi. Need any other info, feel free to ask. I know this is probably a re posted thread but it seems every one gets a different answer.