What is unknown caller?

It can be challenging to provide specific information about an unknown caller as it depends on various factors such as their location, the type of phone they are using, and whether or not they are using a blocked or restricted number. In general, unknown callers could be telemarketers, scammers, or individuals trying to reach you for legitimate reasons but are not in your contacts list. It is important to be cautious when receiving calls from unknown numbers and avoid sharing personal information unless you are certain of the caller's identity. You can use call-blocking services or apps to help filter out unwanted calls from unknown numbers.