Caller ID blocking, or number masking, is a feature available on Android devices that allows users to prevent their phone number from being displayed to the recipient of a call. This functionality ensures privacy by substituting the user’s actual number with a generic identifier such as “Private Number,” “Unknown,” or “Blocked.” For example, when initiating a call with the feature enabled, the recipient’s phone will display “Unknown Number” instead of the caller’s personal contact information.
This practice offers several advantages, including increased control over personal data and protection from unwanted contact. The ability to conceal one’s number can be particularly useful when contacting unfamiliar individuals or organizations, or when making calls where maintaining anonymity is desired. Historically, this feature has been employed by individuals seeking to avoid harassment or maintain confidentiality in various professional and personal contexts.
