Will at&t charge me to change my sim card?

I have an iphone 5, and me and my friend are trading iphone 5 for galaxy note 2, they both require different size sim cards, if we go to at&t will they swap out the sims for free? If not, what's the fee

I couldn't find it on the site, maybe you should call them and enquire instead, at:

By phone: Dial 611 from your AT&T wireless phone or 800-ATT-2020 (800-288-2020)