Does the iPhone 5 need a computer to be activated and does it need Wi-Fi?

I'm gonna upgrade and i want a iPhone 5 but my pc is currently down and so is my Wi-Fi, will i be able to activate the phone or will i need the Wi-Fi and computer or can my cell phone provider activate it for me, i have T mobile and i have a iTunes account, haven't used it in a while tho

Usually the provider does the activation. In order to reap the benefits of the 5, you will need iTunes and Wi-Fi.