So the AT&T iPhone 5 comes with a nano sim?

[GeorgieAcevedo]

And we'll just have to call att to get it activated it ? Or how does it work ?

 

[Macman756]

Comes with a sim, just like every iPhone before it.

 

[bozzykid]

And we'll just have to call att to get it activated it ? Or how does it work ?

Assuming you are upgrading, you will activate it in iTunes. AT&T will already know the SIM card number.