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The first phone was invented in 1876 in March. Alexander graham Bell had accidentally plucked a reed and that's when they realized that sound could transfer over wires.
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in 1877 the first construction started on the first telephone line. it went to Boston to Somerville, Massachusetts.
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It was a page long had 50 names and no numbers. The page was divided into four sections: residential, professional, essential services, and miscellaneous.
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By the end of 1880 there were 49,000 telephones in the united states. The following year telephone service between Boston and Providence, Rhode Island, had been established.
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An associate of Stowgers' invented the rotary dial. Replacing the buttons.
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The first was coin operated telephone patented by William Gary of, Hartford Connecticut. But they were first installed in 1905 by this time there was 2.2 million phones.
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The earliest mobile phones were radio controlled units designed for cars. they had extremely limited range.
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AT&T had experimented with using tone rather than pulse since 1940. This had not started till 1963.
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before 1968 they had no way to call first responders. The Federal Communications Commission and AT&T soon announced they would use 911 since its easy to remember
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the first cordless phones were introduced in 1970. In 1986 the frequency range was 47 to 49 MHz.
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Motorola introduced the first hand-held cellular phone in 1973. Research on what would become the cellular phone network used today began in 1947 at Bell Labs.
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multiple people created devices for identifying where incoming calls were coming from. This started late 1960s. They made it available in 1984 (https://www.thoughtco.com/history-of-the-telephone-alexander-graham-bell-1991380)
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the iphone 12 will have four cameras. the price is estimated to be around $800. https://www.macrumors.com/roundup/iphone-12/
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The technology lets iPhone users place virtual objects in the actual world. You can use it to plan a to build 3D models on your coffee table also play games and much more.https://www.cultofmac.com/488696/future-of-the-iphone/
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it is likely to to adopt more robust materials that don't get damaged as easily. An idea they have is sapphire crystal displays. https://www.cultofmac.com/488696/future-of-the-iphone/
