So I went to
Xiaomi service center yesterday
There was lady at reception feeding complaint data.
And complained that none of my
earphones (
Nokia /
Sony /
iPhone) are working with this phone.
.........
VOILA!!! IT WORKED!!
AUTOMATICALLY!! hahahaha
Even my speakers plug went in!!
I think that socket spring was hard. I never tried to push plug too hard thinking that it will break motherboard.
That lady
UNKNOWINGLY pushed ear plug hard and
unknowingly SOFTENED the socket spring inside.
So now problem solved!!