Question

why do we say hello when we pick up the phone

Answer 1

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.

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Hello is the name of the american girl when the first time any scientist (I don't know name )pick up the phone her wife name was hello that's why everyone say hello when they pick up the phone

Answer 2

Here is your answer

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.

The people started following and now all people say hello while picking up the phone.