I have just bought HTC Evo 3D and as much I am inspired by phone, its speaker performance is giving me equivalent dissatisfaction, the speaker sound is very low for ringtone as well as for music playback. Hardly can hear sound if its kept in another room. I have done few workaround example installing volume+ and also downloading loud ringtones. But no difference, is it possible I can increase its speaker sound. Thanks
This method can be used to increase the maximum speaker output on your HTC EVO 3D, but bare in mind, if you set the output level to high, it might be possible to blow out your phone's speakers.
Note that this method uses software only available for Windows.
Connecting to the Phone and Adjusting your Levels
Credits to XDA Developers forum thread: How To Use QPST to INCREASE the volume on the Evo 3D.
Some issues are discussed on the thread if you run into trouble.