Can I buy an Iphone 5c without a contact?

I want to buy an iphone 5c 16GB, it costs $99 and I already have my own carrier (SIM AT&T). All I really want to do is to replace a phone on my account with a new iphone, that's all I want. So if I just buy an iphone 5c without a contact and just want to replace this phone, I just have to pay the store $99 right? I mean tax and everything. I was just wondering because I Really want to buy a new iphone without paying the AT&T every month because I'm a student. I worked my AASS out to buy a new phone.

Well you can buy an iPhone 5c without contract but the Price is not $99. The phone cost $99 with contract. It will cost you $549 without contract for a new one. You can find a cheaper used one for $300-$400 on Ebay or Craigslist.