anyone can help me with the microphone problem?

I restore the iphone to 1.0.2
and jailbreak it
run the iUnlock

after 20 Minues, everything seems to be working
but when i was making the phone call, ppl cant hear me over the phone
and i tried to record vocie, there is nothing

anyone has the similar problem?
any solution?

try plugging the headphones in playing music then pulling the headphone out
then check the voice record again
sometimes this works