Make "Extra Volume Button" Default

Hello. Me again, expecting a solution as always lol...

I have the Galaxy S5 (ugh).
There is a small button popping up during calls but not popping up during ringing phase.
It is called "Extra Volume Button".
This really makes calls better because otherwise people say they hear my voice low and like from far. As you probably guess, this is something really demoralizes me.
This is not a problem when "Extra Volume Button" is enabled. I get positive feedbacks.
This is not the same thing increasing volume through volume buttons. The latter makes you hear people louder but the first makes people hear you louder.

I would like this button always on by default. How can I do this? Root or non-root methods are appreciated.
Thanks all in advance!

Let's block ads! (Why?)

Make "Extra Volume Button" Default