I bluetooth my phone to my truck radio everyday and bought the Equalizer app to enhance the sound through my stereo. It seems that after the MD4 update the equalizer from both the stock music app and the Equalizer app dont fuction properly. Normally by moving all six sliders up it improves the bass, treble, etc. Vice versa when moving the sliders down. Now when I try moving the sliders up it gets lower and theres no way to improve the volume no matter how I adjust it. I thought it was just a glitch on the Equalizer app so I tried the Music FX which is the stock equalizer and same problem. The best sound is the stock settings which defeats the purpose of a custom equalizer. I tried a hard reset and no luck. I even had the Sprint store reinstall the software since I had a problem with the TalkBack going on by itself. It fixed that issue but the equalizer is still useless. Does anyone that use an Equalizer app have this problem or maybe know that could be causing this issue. I would appreciate some help so I can continue jamming out loud again.