Actually that is technically false. There is a reason expectation of privacy when it comes to phone calls.
In states where there are two party consent laws, both have to consent.
In states with one party consent only the one recording needs to consent.
This is also why companies tell you that you’re being recorded before you talk to an agent.
Or else you run into the illegality of wire tapping
I did not said anything about recording, but about the privacy of the conversation itself - Is not private as long as anyone can disclose information about the content of the call and that information can be verified (thus the anyone can assume that the information provided is correct).
Wire tapping is ilegal - but not sure about third parties overhearing the conversation (event if not intentional). E.g., like someone using a speakerphone, someone can deduct the content of the conversation by the answers (like if someone is with you are talking over the phone)...... change in voice or behavior while on a phone call (cheating?)
Regarding recording here's an article: https://www.mwl-law.com/wp-content/uploads/2018/02/RECORDING-CONVERSATIONS-CHART.pdf
- unsure if it has info up to date.