About 3 months ago I signed up for ADT. Chris told me that my bill would be only $36 a month. I got my first bill and it was $54. Then they said because it was attached to my cell phone it was more. I was suppose to get a $99 rebate. I called about that and was told that they would send me an email. That didn't happen. Also there are times when the app doesn't work right away and you have to keep trying until the alarm set