“Will you be calling from a private or blocked number? If so, please leave a voicemail with a callback number, or send a follow-up text/email.” Also, always check your voicemail. Many private callers will leave a message with their number. That’s your only way back. The Spam Warning: Why You Might Want to Keep Private Numbers Blocked Before you rush to unblock everything, remember: Scammers love private numbers.
The short answer is frustrating but important to understand upfront: unblocking private numbers
They do this by dialing a special code before your number. In the US and Canada, that code is *67 . In the UK and many other countries, it’s 141 . In Australia, it’s #31# . “Will you be calling from a private or blocked number
When they do this, the phone network replaces their real number with a generic label like "Private" or "Unknown" before it ever reaches your phone. That’s your only way back