There were times when
people hates device with a very loud speaker,
but it seems the story has changed. Today, you
often here people ask, "why is your phones
volume this low? " And you might reply like "I do
it cool", but believe there may be instances
when you really need to operate your phone,
noise pollutions are there to wave off the
sounds co
ming outta your phone.
Let's start with how it's been done. Come, tell
me what is there you are with, a Juice? or you
are holding a snack? draw them closer and let's
have fun drinking it together while we get the
solutions.
source:


Tools Needed

1. Mobile uncle you can get that from playstore
or HERE
2. Make sure you backup your device, to avoid
story that touch.
Now,to the main steps ..
1.launch the mobile uncle then, go to engineer
mode.Easy on MTK device, so, go to MTK
SETTINGS
2.move the page to the front under
hardware,there you will see audio there click
on it.
3.You will see normal mode,headset and
loudspeaker. Do not change anything apart
from those things I wrote here or else you will
have your device bricked if not careful.
4.Change the highlighted values. The highest is
160 do this for both headset and loudspeaker
then save and reboot your device.
Note:You can write down/take a screenshot of the
values before changing it.so that you revert the
changes anytime you like.
source: http://www.techpays..com/2015/01/the-perfect-way-to-increase-your.html