I use a Covert as well, currently with the Covert external antenna on a piece of sched. 40 PVC tie-wrapped to a T-Post. I had to use a wagi antenna ($100) I think they're called on my lease in OK which had really poor reception. You need the Covert Solar panel as they eat batteries, great picture quality. The AT&T cell plan now is $30. :-( Go to the AT&T Store to get the plan setup and bring the camera with you, do not try and do it online.