Nah, phone calls are even worse than SMTP here. Caller ID means nothing. It's like a From header on an email with no DKIM. It can be set by the caller to anyth

Nah, phone calls are even worse than SMTP here. Caller ID means nothing. It's like a From header on an email with no DKIM. It can be set by the caller to anything, if they have access to some trunk from an operator that allows this. It's another trust based thing, with no automated verification. Trusting caller ID was the initial mistake. Never trust caller ID with your money. It's like trusting sender names in your spam folder mean anything.