Step 1: sign up and pay for your first month with AT&T (can be any of their Vita plans)
Step 2: go back into the Connect to AT&T application
Step 3: Log in to your account
Step 4: Click on My Devices and Plans
Step 5: Click on your device
Step 6: Scroll down and click on Add a Plan
Step 7: You'll see a button that says you have a coupon, click on it
Step 8: click on the PSVITA coupon and follow the prompts, this will give you one free 250mb session when your first paid session ends
I had a heck of a time figuring out how to do this, had to talk to a Sony rep and an ATT rep. ATT rep confirmed the free game is after your PAID month, not the free one, so we'll get a code emailed to us during our free month.
I also requested a sticky, this is need to know information not only for us FEB users but for all 3G buyers as well. Great find, when I get off KoA I will be my Vita all night because I have no class today or tomorrow!