All of a sudden my microphone stopped working. I can hear and call and hear but no one can hear me!!!!! It was working just fine late last night. I don't know what it could be i checked all of my settings and i don't have anything blue tooth attached to it. Does anyone have any insight as to what happened and how i can remedy this!!!!! Please and thank you!!!
Yep, those are worth a try and would be my suggestions as well. (hey, B! 
)
How to do a system cache clear:
Power down phone
Hold volume up/down & power simultaneously
Use volume down to navigate to 'Recovery', use volume up to select
Should see screen with triangle and exclamation point next to an Android
Press volume up/down simultaneously
Use volume rocker to navigate to 'wipe cache' and use power button to select
Once finished, use volume rocker to navigate to 'reboot system now' and use power button to select
