Boost Speaker Volume

Enter the dialer
##634# –> Call
*#0002*28346# (if no response try *#0002*28345#)
Click Get under the Device Gain (max/min)
In the first box keep the number 7
In the second box put 16000
In the third box put 0
Click Set
Click Start
Click the home button
Restart your phone. To verify the setting took click the get button and it should show your values

Boost Headphone Volume

Plug in headphones
Enter the dialer
##634# –> Call
*#0002*28346# (if no response try *#0002*28345#)
Click Get under the Device Gain (max/min)
in ‘device gain’ leave number 5, set 1100 (max) and -1100 (low)
Click Set
MAKE SURE AUDIENCE.CFG IS ON
Click Start
Click the home button
Restart your phone. To verify the setting took click the get button and it should show your values