Speed dial is a phone feature that allows users to quickly dial a frequently called number by pressing a single button or a few digits. This feature stores a phone number in the phone's memory, associating it with a specific button or code. When the user presses that button or enters the code, the phone automatically dials the stored number, saving time and effort. Speed dial is available on both landline and mobile phones, making it easy to contact family, friends, or business contacts without having to manually enter the full phone number each time.

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