The ability to prevent one’s mobile telephone number from being displayed to the recipient when making a call is a feature available on Android operating systems. Functionality to achieve this is typically built into the phone’s settings or can be achieved using prefix codes before the number dialed. An example would be dialing a specific code, followed by the number, that overrides the default caller ID settings.
Concealing the calling number provides a degree of privacy for the caller. This functionality is beneficial in situations where one wishes to make a call without revealing personal contact details. For example, when contacting services or individuals for the first time. Historically, *67 has been a common prefix code to achieve this functionality in the United States, though the exact code may vary depending on the carrier and region.
