I have numerous albums on my iPhone. I didn't intentionally put them there that's for sure. They just appeared. I think they're all music i've bought through iTunes with the exception of a u2 album which i didn't buy at all. I've deleted things off my iPhone before & found they've been deleted elsewhere & i'm not wanting to make that mistake again. Basically i want ALL music deleted from my iPhone but to remain on my iTunes. How do i do that?