Does unlocking an iPhone still make you pay for data?

I'm planning on buying an iPhone off of craigslist, and it unlock after. If I unlock it, will I have to pay for data if I don't put in my sim card right away? I know how to unlock it, I just don't want to pay the data plan for a smartphone and not get caught.

Can i buy an iphone from AT&T and use it for Virgin Mobile?

I heard you can unlock the iphone 4, if i do that would i be able to take it from AT&T and use the same iphone 4 for Virgin Mobile? Or would i need a completely new phone? I know if it was AT&T to T-Mobile it would work but i'm not sure for other phone companies

Is the White/Silver iPhone 5 just for girls?

I'm going to get an iPhone later this month and i want the white/silver one. But everyone says that white is just for girls when there are a bunch of guys with the white one. I just don't want people bothering me about getting the white one. I have a black iPhone 4 right now.
Also what color beats solo's should i get blue, black, or white?

Can i swap my contract blackberry for an iphone 4?

Ok I have a blackberry 9900 on an 02 contract that still has about 18 months left and i hate the blackberry i was wondering could I sell my blackberry and buy an iphone 4 and put my contract sim in it only problems i have is that the iphone has a different sim and is it illegal would i get in trouble from o2? I would obv still poy the contract

IPhone Wi-Fi Connection Problems? - 2

While I'm on campus at my university, the 3G is basically non-existent. I connect to my school's wireless and it always connects fine and works great but as soon as my phone goes to lock screen it disconnects. Every single time. Why does it do this and is there anything I can do for it to just hold the connection? This doesn't happen on my own Wi-Fi at home when my phone is connected.