How to activate my iPhone 5 using AT&T?

For Christmas I got an iPhone 5. The problem is that I have another phone, a Galaxy Note, and the person who bought me the iPhone 5 purchased it without a contract. Basically, I was just wondering how I could activate my iPhone 5 today, if possible.

Added (1). 1. Are you moving your existing number to your new iPhone?
Yes.
2.Is your current carrier AT&T?
Yes.

Hard to answer that question…

1. Are you moving your existing number to your new iPhone?
2.Is your current carrier AT&T?

I'm having the same problem… Last year when I upgraded from the iphone 4 to the 4s I just popped out my old sim card and put it in my new phone but the sim card for the iphone 5 is even smaller so that doesn't work! Customer service is away on Christmas so I can't activate over the phone and I believe there's a way to activate it online but I have yet to figure it out! I don't think there's a way so you will probably have to wait until tomorrow to activate it. What a shame I know! Merry Christmas!

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