The "Silent Mode" feature on mobile phones was first introduced in 1999 with the Nokia 3210. It allowed users to turn off all sounds and rely solely on vibration for alerts, making phones more discreet in public settings.
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The "Silent Mode" feature on mobile phones was first introduced in 1999 with the Nokia 3210. It allowed users to turn off all sounds and rely solely on vibration for alerts, making phones more discreet in public settings.