i cant hear them and they cant hear me...

[2kidz]

ok, since 12/30/09, the only thing that i have downloaded has been the ziggy/2016 cab...now, all of a sudden, my phone screen/keypad is totally different and i cant hear my incoming calls nor can they hear me...i have gone thru my settings and deleted as much stuff as i possibly could, all to no avail! i DONT want to call cust suppt and i DONT wanna have to go back to the sprint store so can u guys please help me retrieve my sound asap? my phone is soooo very pretty right now so PLEASE dont suggest that bad word--->HARD RESET! thanks in advance!