Arlo Go and ATT add in

[toothdoc87]

I just called ATT to see the cost to add the Arlo Go to my existing plan.  I was told it would require adding a phone line for the device which would be $20/month plus tax.  My current plan is a 6G allowance and since I teeter on the edge of that now, I would think adding a camera that would draw from the same data would probably push me to needing next level data allowance - which is 8G.  That would add an additional $40 to my current plan.  So, a total of $60 to add the Go to my existing plan.  Am I understanding this correctly?  

[jguerdat]

That sounds about right although oher carriers have told users that the camera would be an additional $10/mo, not $20. Maybe I misunderstood the posts.