FDN
Fixed Dialing Numbers
A feature that allows the phone to be "locked" so that it can only dial certain numbers, or numbers with certain prefixes.
A PIN code (numeric password) protects the allowed list of numbers from being changed by any person who does not know the PIN code.
This feature could be used in several ways. For example, a parent might give their young child a phone that can only dial the parent.
Last updated Jan 6, 2021 by Rich Brome
Editor in Chief Rich became fascinated with cell phones in 1999, creating mobile web sites for phones with tiny black-and-white displays and obsessing over new phone models. Realizing a need for better info about phones, he started Phone Scoop in 2001, and has been helming the site ever since. Rich has spent two decades researching and covering every detail of the phone industry, traveling the world to tour factories, interview CEOs, and get every last spec and photo Phone Scoop readers have come to expect. As an industry veteran, Rich is a respected voice on phone technology of the past, present, and future.
