Dopod 818 Pro goes quiet when answering phone call

[UnoS77]

My device is Dopod 818Pro G3 installed with WM6 fantastic b4. Have use it for 5 month

1. Recently 70% - 80% of the time when I answering or make a phone call, my Dopod 818 goes quiet (no sound at all) but at the screen the call time duration still counting and running.

2. My second problem is I can’t connect to the Wi-Fi.

All other function is working fine and never hang

Please help to solve my problems

[UnoS77]

Hi, my problem solve. here what i did

I hard reset and soft reset more than 20 time... at the end my dopod got worse.. no sound at all ( still can run media player, audio play but no sound come out) except for incoming call... but then still when answering the call my dopod as usual go quiet. I really give up and left my dopod overnight... and suddenly this morning my dopod working fine again... i really don't know why... but at least my problem solve. :)

Now I'm looking software Pda Expert Pda Brilliant WM6... because this software is deleted when i do hard reset... any body know where i can download?