BB 7130g 4.2 Bluetooth Bad sound

Since the beginning i have difficulty with the bluetooth and my BB7130g i can only do 1 call and it disconnect every call after it .. so i change the firmware for the 4.2 today now the bluetooth stay but ''very very very bad sound'' my wife can'T hear me and most of the time i dont hear her too .. Plus when i try to record a sound message or when i try to listen the new ringtone my BB7130 freeze and reboot by himself .. i installed the 4.2 without the desktop software 4.2sp2 i install it with the one who came with my phone .. Some one can help me ?(now i'm downloading the Desktop software4.2sp2 to install on my BB the 4th time):confused: