Chosen Solution
What is the little hole next to the USB port? My niece was playing with my phone and she pushed a needle through it. I do not see any adveser issue but I know that a needle can not fit in it as something was holding it there.
Victor J (Mytre) that is the opening for the microphone. If the mic still works then nothing to worry about. Wait until something actually fails before trying to tear it apart and to check for damage. Time will tell ;-)