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A note about the rotary telephone recommendation. Assume that your conversations on the telephone network are being recorded every time that you use the phone. Using electro-mechanical devices over phones with microprocessors / digital controllers is simply to remove a hacking vector whereby a hacker can bug your entire house reversing the phone from a communication tool into a surveillance device. Stick to lawful non personal, business and fact relaying only conversations over the telephone, (ordering takeout, calling the government, job interviews, etc).
If you can, get a tape deck answering machine. Most of the modern digital answering machines allow (key code) remote playback. Get a tape deck and a cassette for phone messages with a physical control (play stop and rewind buttons) (mechanical requires physical access). Don't use a "digital mail box" at the phone company to store your messages.
Don't ever respond to telephone surveys, (Phishing attempts) just tell them no thank you I'm not interested , and hang up, and do this politely (say thank you, have a great day and hang up).