to be honest i have no idea.. but seeing as "hello" was around LONG before the telephone i should think that traditionally and most commonly nothing else was used... except when of course people are calling friends not everyone starts with hello.. though most do..
hello on the telephone
hello
hello
Most people simply say "hello," which is the standard word for answering the telephone. Some people say jambo, but this is akin to pidgin Swahili. Standard Swahili greetings are questions, inquiring after the health of the interlocutor.
¡Hola! When answering a telephone, instead of saying ¡Hola! many people say, "Diga" which literally means 'Tell' or 'Say.'
moshi moshi
hello..this is xyned
Hello.
hola, is how you say hello in Spanish.
The telephone was never suppose to be a device that had a ring, but an open line between two parties for business. A greeting wasn't needed. Bell suggested that the word "ahoy" be used. It was Edison who came up with "hello" according to the archives of the American Telephone and Telegraph company. Dated Aug 15, 1877 a letter to the president of the central district and printing telegraph company in Pittsburgh. By 1880 hello was what was said and was the right way to answer the phone.
Chinese people say hello by saying ni hao.
In Penrhyn, people typically say "Kiorana" to say hello.