is a mobile phone a touch tone phone
Push-button telephone The international standard for telephone signaling utilizes dual-tone multi-frequency (DTMF) signaling, more commonly known as touch-tone dialing. It replaced the older and slower pulse dial system.[17][18] The push-button format is also used for all cell phones,[12] but with out-of-band signaling of the dialed number.
Phoneme A phoneme (/ˈfoʊniːm/) is one of the units of sound (or gesture in the case of sign languages, see chereme) that distinguish one word from another in a particular language. For example, in most dialects of English, the sound patterns /θɪn/ (thin) and /dɪn/ (din) are two separate words distinguished by the substitution of one phoneme, /θ/, for another phoneme, /d/. (Two words like this that differ in meaning through a contrast of a single phoneme form what is called a minimal pair). In many other languages these would be interpreted as exactly the same set of phonemes (i.e. /θ/ and /d/ would be considered the same).