Iphone 3g microphone not working!!!

[cln78258]

my iphone's microphone is not working. what happens is people cannot hear me but i can hear them. ive used the voice memo thing to test the mic. it sometimes works for about 20 seconds then my voice becomes fizzled and muffled. I thought it could be a bad microphone so i had it replaced, but that didnt fix the problem. could it be the charger port or the logic board or the battery. I am so frustrated any help would be nice.

 

[175170]

my iphone's microphone is not working. what happens is people cannot hear me but i can hear them. ive used the voice memo thing to test the mic. it sometimes works for about 20 seconds then my voice becomes fizzled and muffled. I thought it could be a bad microphone so i had it replaced, but that didnt fix the problem. could it be the charger port or the logic board or the battery. I am so frustrated any help would be nice.

How did you have the microphone replaced?
Did Apple fix it for you?

 

[cln78258]

Apple did not do it, they directed me to go to a local comp that specializes in apple products.

 

[175170]

Apple did not do it, they directed me to go to a local comp that specializes in apple products.

First, did they charge you for the repair?
Secondly, have you tried restoring your iPhone without restoring it from a backup afterwards?