Hi,
I would like to recommend the RidgeTec Lookout 4G LTE camera as an option for you. I am personally involved in its design and am selling this unit. The RidgeTec Lookout does a much better job than Covert or Spartan and the data plans provide more for less.
If you have any questions feel free to ask me. pm me and we can discuss this camera in more detail either by email or phone if you like.