Well i noticed a lot of the esteem family has been complains about the sound .some of us went as far as getting beats audio and dsp manager . Well i been testing this out for a few days now and you can to all i say is make a back up before playing around with this . That will include getting numbers copied down .. Now first go to dial pad. Hit ##5473784236368 Next you would see it ask for the spc code if you have one to put in if not this isnt for you cause if you put in the wrong you could screw up your device . Next if you got past the spc code great. Scroll down to audio cal and change the settings to what you like but remember copy down the settings before starting . I also see many other things like battery calibration . You may find the teething problem and more ...... just make a back up before changing anything ......:what:

 

Hold on i will post a link in a few ......this spc code would be needed if your phone was to go to Test Mode

 

Its called. MEID CONVERTER......IN THE GOOGLE PLAY STORE and its free

 

Yes i notice a big difference and this isn't just for sound repair it handle many other task. Also test and repair led lights