How speed dialing in the telephone works?

in the telephone how can we activivated the speed dialling without touching it?

Answer:
Without touching the phone, you would have to have a "voice activated" phone with that feature enabled. I am not sure if there are home phones with this, but there are some cell phones with it. The only bad thing is that every time you say someone's name that you've programmed a number for, if the phone detects the sound of your voice, it will call that number. So, if you're just talking about someone, be careful cause it'll call, they'll answer, and they'll hear what you're saying about them.

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