iPhone Generation : 8gb Iphone 3G
Unlocked? (or Part Number): Maxis Unlocked
Current Firmware : 2.2.1 (5H11)
iTunes Version : 8.1
PC/MAC : PC
Jailbreaking software : none
Problem Encountered : Reception cut off when loudspeaker activated during calls
Steps Taken So Far : Restored firmware via iTunes
Screenshot of Problem(if applicable) :
Other Information/Remarks :
Not sure if losing receptions every now and then is a problem as well, but the most significant one is whenever i place a call, whether it is connected or not... the reception will cut off and asked me key-in sim pin to unlock... and sometimes during calls ter-press loudspeaker.. it will give a screeching sound..

All other things works flawless and fine... even songs on loudspeakers works fine.

help me plz T_T