I installed one of those orange screen protectors,those that you have to apply a solution,formula and my iPhone was on and now I can only hear the ringtone,messages and other alerts but no sound in games,videos or music,even the keyboard clicks and the lock sound I can't hear.With the headphones,everything works just fine.I tried to clean the dock connector with a toothbrush,I cleaned the 30 mm jack,I used a blow drier with minimum heat from a proper distance,I kept the iPhone turned off for 2 hours,I restored,nothing.And when I unlock the iPhone,I can hear the lock sound once and if I quickly go to spotlight and type,the keyboard clicks work for about 4 seconds.