Is a landline phone line needed for this system? we are trying to avoid a monthly cost of a landline.
Yes Mike. These require a landline. We do offer a 4g add on but that means you pay monthly for a sim card. Alternatively you can search on our site for Security Brands which specialize in 4g or better yet, DoorBird systems which work on wifi and do not require a landline. Feel free to give us a call with any questions.