dail:*#*#3646633#*#*
or
dail: *#15963#*
or use “MTK Engineering Mode” app from Google Play Store
enter in to EngineerMode, plz be careful, do not change any data that you do not understand, or
maybe cause many BUG and you device can not use.
increase Earphone volume on the mobile phone:
How to increase ringtone volume for mobile phone, after setting the follow steps successfully,
reboot your device.
How to increase Mic Volume
audio-normal mode
type-mic
level
level 6 is the max
level 1 is min
after setting finished, reboot your device
eg.:
Under ‘Type’ select ‘Mic’. Under ‘Level’ select ‘Level 0′.
Under ‘Value is 0~255′ enter 255. For all levels, from level 0-6 set the value as 255. This will
ensure that your voice is audible to other person even when you turn down the speaker volume.
For some version rom, we can not save the level 6. then follow this, only change the max vol to
160.