I mainly stopped using phone calls years ago, and I hope more people also do. I ported my main number to voip.ms and created a couple others to use for pseudonymous accounts. The service is cheap at about $1/month per number, but it is a little technical to configure and is sometimes spotty. My phone number has sometimes been unregistered/out of service for long periods which has been a bonus. Nobody who really knows me calls me on the phone. Instead they know to go to my web page that has many ways to call me including a URL to a Nextcloud Talk conversation, Simplex, Session, XMPP, and Matrix.

If you want a slightly more expensive but simple and reliable number on Android, I highly recommend jump.chat.