Hey penny, ive been looking around for awhile and i think ive found your solution

it involves going into engineer mode so make sure you follow the instructions...
go into engineer mode by typing *#3646633# from the dialing feature.
go down to Audio(3)>Set Mode(1)>then select (normal mode) and press ok.
get out of engineer mode and try it out

tell me whether or not this works

good luck!