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Your post needs a lot of clarification. For instance, you talk as if modern communications are a product of the 20th century. Not true. Telegraph and Morse Code were well established in the US before the American Civil War. Most folks should know that without needing to ask historians. Less known is that the Lincoln Administration controlled what went over the telegraph lines, and in doing so censored war news written by war correspondents to their newspaper employers. News from the battlefield was critical to decision-makers in Washington and Richmond. It was so important to Lincoln that he spent much of his time hanging round the telegraph office in the War Department. Prior to the War and in its wake, the telegraph reduced the time between sending and receiving a message from weeks, or even months to the time it took to transmit.
The development of Printing Press technology also is rooted in the 19th century. By 1900, rotary presses and Linotype machines made mass publication possible. Cities often had several competing newspapers, and competition between large newspapers was very fierce. Hearst pioneered "Yellow Journaliism" the ancestor of today's tabloids, and a newspaper subscriber in Kansas could have a copy of a national edition of several major newspapers. The size and coverage of new expanded, and several "Wires" came into being (AP, UP, Reuters, etc.) The power of the printed Press continued past the mid-20th century, but has been in decline since.
Some of the earliest radio programming was news, and supplemented printed media. Printed media included periodicals some of whom existed before the Civil War, but increasing in number and topic through the mid-20th century. Colliers', The Atlantic, The Police Gazette, etc. are all examples.
Television was demonstrated before WWII, but was shelved until after that conflict was concluded. By the end of the 1950's most major urban markets had at least one television station. TV programming like radio, but with grainy B&W images on a tiny screen.
I think that might be what you are after, but maybe not. If you are contemplating writing, you need to first work on your writing skills.