The first hand-held mobile phone was introduced for personal service starting in 1973 by Motorola. For greater mobility, various radio systems were developed for transmission between mobile customer stations on ships and automobiles from the 1930s by the mid-1900s. This gave rise to landline telephone service in which each telephone is connected by a pair of dedicated wires to a local central office switching system, which developed into fully automated systems starting in the early 1900s. Being impractical beyond just a few customers, these systems were quickly replaced by manually operated centrally located switchboards. These can be used in the website landing page, mobile app, graphic design projects, brochures, posters, etc.

The first telephones were directly connected to each other from one customer's office or residence to another customer's location. 107,297 Phone Icons - Free in SVG, PNG, ICO - IconScout 107,297 Phone Icons Free Phone icons in a wide variety of styles like line, solid, flat, colored outline, hand-drawn, and many more such styles.

A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user. A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.

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