Question

why we say "hello" on phones?
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Answer 1

Explanation:

Hello didn't become "hi" until the telephone arrived. The dictionary says it was Thomas Edison who put hello into common usage. He urged the people who used his phone to say "hello" when answering. His rival, Alexander Graham Bell, thought the better word was "ahoy."

Answer 2

The term 'hello' was first used by Thomas Edison to answer the phone. It then became the standard for answering calls.

“hello” was noted as the official greeting in many of the first phone books. Official manuals of the first telephone exchanges (Ever see movies where switchboard operators connected two callers? That’s a telephone exchange) gave “hello” equal importance.