Mic Not Working - No one can hear me!
I have an iPhone 3G 8gb that is unlocked and jailbroken, running on 4.2.1 with baseband 6.15.00. Everything is working except for the mic. When I make or receive phone calls, I can hear the caller but they cannot hear me. However, if I blow into the mic...they can hear that. I have opened the phone up, checked and cleaned all connections. After putting the phone back together and trying a phone call - it WORKS...but only the first time! The next phone call made - same thing happens - the caller cannot hear me. Sometimes there is an awful buzzing noise...like a bee hive. LOL I have replaced the dock several times but the same thing happens. I have done a hard reset, restored the phone and then re-jailbroke and unlocked it - nothing seems to work. This phone hasn't always been like this...it worked great when I first bought it (used - on eBay). However, a few months back I replaced the digitizer and the back housing and also did the update to 4.2.1... and ever since - I've had this problem. Help!!!!!!
Still having the SAME issue! I have taken this phone apart I don't know how many times now trying different things. I even opened up one of my other iPhone's and checked every single connection, every last screw, cable, etc...just to make sure I wasn't missing something or that something didn't look broken. EVERY SINGLE OTHER THING ON THIS PHONE WORKS! It's driving me nuts!!! I don't know what else to do. Can anyone help????? I was able to plug in the phone with the cable to a wall outlet and when I tried the "Voice Memo" to see if it would work....it did...then when I tried it again - it wouldn't work! The only thing I could hear was myself blowing into the mic. I'm so confused!!!
if you think this problem started around the time of the repair then I think you should be looking for physical damage..and it can be subtle. Pin 39 and 41 in the picture are for mic on the connector 4.
you might also like to take a look at all the small pieces around that connection..som
last resort would be to get the audio chip replaced/reflow
Cheapest solution would be headphones with mic...