But when we talk to a known person, either knowing the caller ID or identifying the voice, we also address by how we usually address them.Example 'Ha bolo bhai'.'Ha beta bol' , 'Yes ji' etc..
Now the Google voice assistance we are to say 'OK Google' . Such things are actually made so for convenience of uniformity. As they are used universally, we need customise it or go behind the reason and logic of every such thing.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
Anyone could be calling you. So saying "hi" is not an option.
And also, when a person says hello, it becomes difficult for you to say "hi".
Some terms are here for universal comfort.
Hello is known to people of every language.
I don't think non-English speakers know "hi".
And the most interesting thing, you only say "hi" to someone when: 1. You meet them in person 2. You meet them after a very long time.
Hi is a short of Hey I believe. Hey is used to grab attention. So hi is only useful to grab attention. Using it while calling is weird.
The stronger a light shines the darker are the shadows around it.
No life without Sun
Calling Hi is not correct in phone why because generally we say Hi to our friends and younger people but we can't say high to our elders. So calling Hi may not be proper.
'Radhey Shyam' hare ram, ram ram. It is heard that Late Mr M,G.R, former chief Minister of Tamilnadu used to tell 'Vaazhga valamudan. (meaning: 'live pleasantly'). But once mobile has come into vogue, the word hello also getting vanished and they call other other side as 'engeda irukke?' which means 'where are you?'
My father used to tell over phone after dialing, 'naanthaan pesukiren' which means " I am only speaking'. We used to comment him jovially (as my father never took seriously if we comment),'appa it is not the phone with camera, how the other side person knows you?.
According to me it is good to tell the name who is picking up the phone and asking the other side.