Earpiece Not Working..

[Touch Pro kid]

My Earpiece just stop working during phone calls but everything else still works. Is the earpiece blown? I have to answer the phone and switch to speaker to hear he phone call.. (((Annoying)) Anyone else have this problem? I've used the audiopara lite fix with no problems since day one. Soft resets and and reinstalling programs and still no luck..

Any ideas???? Will Sprint just swap it out?