hmjgriffon
Known around here
Actually most of their systems use hardwired phone lines with back up cell.
I do not pay for monitoring on my own stuff. I have a cam with alerts, BUT.. it is not that dependable.. Not near as dependable as hardwired alarm with cel backup. Like the OP I am interested in personal monitoring with DIY cel alert, I just haven't seen the technology that is dependable yet.
That's it right there, their is no money in that for them, so they haven't developed it.
You can include backup cell in your own system, you can have a cheap cell hot spot. If you have decent internet the land line is not needed. Camera motion isn't super dependable but if you can get PIR, door and window sensors etc. it will be the same kind of stuff they would put into your house, you can then not worry about doing motion with the cameras. You can set up anything just as good and most likely better than anything you will pay for from a company, and avoid the markup and installer fees lol. You may need some forum help or a buddy that knows enough to help though.