i apologize in advance, i checked the search for this, and the thread kind of confused me. with the unlimited plan through the original iphone, do i have to do that (put the sim card and...that's it..i think) before or after i buy the iphone 4, i.e. i buy the iphone 4 now with the 25 dollar plan, and then next week put my micro into old iphone...and done, unlimited 30 dollar plan on iphone 4? again, i'm sorry if i'm being repetitive, please have grace, i'm in a big rush.