I have a couple Spypoint cameras in an area that has very poor coverage. However it does work. The cameras take the photos, hold them and keeps trying to get a signal. When it does, it'll send all the pics it has taken at once. I may go a day or so before I get anything on my cell phone, but when I do, I get a whole bunch.

For what it's worth, I have Spypoint and Tactacam Reveal cameras. Both have proven reliable. The Tactacam's have superior images but they are higher priced models. The Spypoint's were easier to set up and start transmitting. I had much more difficulty with the Tactacam's and had to call customer service twice to get them up and running.