Increase Volume Of Loudspeaker Earphone Or Mic of Android Device in engineer mode(MediaTek).
You can enter into engineer mode by using Mobileuncle MTK Tools in mediatek devices.
Note :-
If you want to increase speaker volume further after setting maximum volume to 160 then you can make change in value upto 255.
Increase in multiple of 12 gradually upto a level of satisfaction or maximum value of 255
For written tutorial with pictures visit http://www.zopomobileshop.com/zopo-rom/how-to-increase-zopo-mobile-phone-mic-loudspeaker-and-ringtone-volume/
For Advance users please visit this link for written tutorial :
Engineer Mode Tweaked Audio Level Settings
http://forum.xda-developers.com/showpost.php?p=41145394
Download Mobileuncle MTK Tools:
[1] https://play.google.com/store/apps/details?id=com.mobileuncle.toolbox
[2] http://www.4shared.com/mobile/6MRgc2jJ/Mobileuncle_MTK_Tools_v295.htm
[3] direct link: http://d-h.st/oEj
[4] http://www.4shared.com/get/Oq7mZpVO/mobileuncle-mtk-android-tools-.html
[5] http://www.mobilescommunity.com/android-os-applications/223654-mobileuncle-mtk-tools-v20140111v2-9-9-a.html
Download Applications to Increase Volume of Speaker & Headphone:
[1] Volume Booster: https://play.google.com/store/apps/details?id=com.divi.volumebooster
[2] Speaker Boost: https://play.google.com/store/apps/details?id=mobi.omegacentauri.SpeakerBoost&hl=en
[3] Volume+ : https://play.google.com/store/apps/details?id=com.FREE.android.lvh
Some important links for Android Codes:
[1] Android Samsung Secret Code
http://forum.xda-developers.com/showthread.php?t=1203632
[2] Galaxy Note Dial Pad codes
http://forum.xda-developers.com/showthread.php?t=1520115
[3] Samsung Engineering Test Code
http://forum.gsmhosting.com/vbb/f777/samsung-engineering-test-code-1593367/
[4] Secret to Unlocking Jelly Bean Service Modes
http://androidforums.com/samsung-galaxy-s3/708404-secret-unlocking-jelly-bean-service-modes-found.html
[5] complete-samsung-galaxy-s3-s4-secret-code-list
http://emilights.com/blog/71-gadget-tech/809-almost-complete-samsung-galaxy-s3-s4-secret-code-list
[6] MTK Phones Dial & Secret codes
http://forum.xda-developers.com/showthread.php?t=2313812
[7] Engineering mode codes and apps on Android 2.1/2.2
http://forum.xda-developers.com/showthread.php?t=761594
[8] Engineer Mode Test Tool
https://play.google.com/store/apps/details?id=com.ponphy.engineermode&hl=en
[9] MTK Engineering Mode
https://play.google.com/store/apps/details?id=com.themonsterit.EngineerStarter&hl=en
[10] Most Useful Android Secret Codes To Know
http://www.arungudelli.com/android/most-useful-android-secret-codes-to-know/
