We still have a landline phone at home, in addition to our cell phones. It was necessary up until VERY recently because the only high-speed internet in our area used to be DSL. When other options became available and we switched, we kept the landline because it's still useful and it's pretty cheap. However, we don't pay extra for caller ID on that line, so my outgoing voicemail message asks people to leave a call back number. And most people actually do.

I have teenagers at home who find this hilarious. But my youngest recently lost her cell phone privileges due to some issues with her Algebra grade. I told her she could still call friends and receive calls on our landline if she wanted to. One of her besties has been calling us on that line and it's pretty funny to witness. They don't really understand how to answer a phone when they don't know who is calling. And my daughter had to write down her friend's numbers because she didn't know any of them by heart. I told her that I knew ALL my friends' phone numbers and several other important ones back in the day. And then I rattled off a few that I still remember to this day. She was baffled.