IPhone 5 (AT&T) I want to buy an unlocked iPhone 5?

If I were to buy an unlocked iPhone 5 from someone, would i have to pay monthly for internet use? Second, how would I be able to transfer my number onto that phone? Lastly, would i pay regularly for texting and calling as I already do?

Nice!

Why buy an unlocked iphone, when you can unlock yours? And everything works the same on locked an unlocked iphones. If you are interested, email me at stefan.zxcvb@live.com