Spartan GoCam is the best cellular camera on the market today. Rather than adding it as an extra line, use the ATT buyasession data plan. $25 and change covers you for 3 months, so less than $8.50/month. Spartans premium app and web portal is $3/month. So, less than $12/month gets you pics to GoApp on your iPhone. I don't think you can add a line on your phone plan for less $12/month with the taxes. You will love the goapp.
The ATT Data Connect plan is definitely the best. We use the $25/3 months/1 gig plan. Even on our most active cases, we never get anywhere near the 1 gig cap. We can also let a plan expire when we don't need the camera, then easily restart it online at no extra charge. This has saved us a lot compared to keeping the plans active when cameras are not in use.
Devon, is this thru Covert or AT&T? I'd prefer to do that too