It seems that after I unplug a jack from the audio output, such as after listening to Pandora in my car, I tend to lose sound from Android's built-in speaker later on, such as when in bed (or trying to show-off the "guitar" application, for a hot bartender!). My ringer, media and alarms do not sound! That is quite frustrating and "unreliable". It has happened once before and I fixed it by resetting my phone. But is there a permanent solution? I have even tried sound device applications that make it "appear" everything is not muted, but no consistent luck. Thanx