How to get voicemails from IRS or the billing department? How to give scammers my number that they call me?
Get textnow, google voice or another company that supplies a phone number you don’t mind getting spam calls (NOT your real number!) Then subscribe to shady services with the phone number such as “get rich quick” bitcoin scams, etc…
Another method is to look at sites such as nomorobo.com, which document scam robocalls.