How to Increase Speaker Volume in Any Android Device

Speaker is one of the most important part of your device. Many devices have low volume issue, so we can't even hear ring tone volume in crowd area. Here is how you can fix this issue-

1. Volume Booster - There are many apps available on play store which can improve voulme of your device. Best App for this is Volume Booster. This app works on both rooted and unrooted devices. This is lightweight and easy to use.
- Dowload App
- Boost Volume as per requirement

2. Engineer Mode (MTK Device Only) - It works on MTK devices only, snapdragon chipset is not compatible with this.
- Enter *#*#3646633#*#* in the dialer
- Enter engineer mode
- Select Audio option
- Tap on Loud Speaker mode
- Change the default value to 140 or 145

3. Viper4Android (Rooted user only) - This is method to boost speaker volume and works only on rooted devices. 
- Install the app
- Grant superuser permission
-  Select Audio Quality and Equalizers, Enjoy !!!