I've been living in the same house for close to 30 years, and have never had a problem with my landline phone, other than the wiring going bad to one of the extensions. I've had a cell phone for probably 15 years, and have experienced 1 or 2 days a year, when I can't get a signal due to a switch problem or an upgrade. It's that one or 2 days a year when I realize how important it is to have the old wired phone. Neither one of my kids have a landline and there always seems to be a rare occasion when they can't use their cell phone. I still insist that for many people, it's important to have both. There are no guarantees with anything.