AT&T has a promotion where they give you the wireless charger for free. However, it is ordered separately and mailed to your home. At least that's the deal I got with my phones a few days ago. Still waiting for the chargers though.
I purchased the phone at Best Buy. I contacted AT&T support and asked about the charging pad. They have placed the order although the last time I checked it still hasn't shipped. Maybe I just got a kind rep, but I don't think it would hurt to try.