Other caller cant hear me

[midniter]

Iphone 3g (3.0) Jailbroken

Recently, When i recieve or call anyone the other person cannot hear me at all.
I have tested this by calling myself. I cant really tell if the "speaker mode" works or not. Its kind of confusing calling yourself lol.

Recent apps that i added were Pedometer, iBlacklist, Tethering.....

All kind of other sound are working just fine.

If any, where are the microphone settings located?

No i did not drop it or step on the iphone, i dont do that kind stuff. And frankly ppl who do that are very annoying to me. Once this girl told me how she stepped on her laptop I was like u dumb *^$@&# are u blind. lol.

Anyway mic stoppped working I had this iphone for abt 1 1/2 yrs and treat it like my only child no scratches no nothing i take good care of it.

No the case is not covering the mic.
No i have not tried to Restore it, why wud I go through all the trouble again lol. Unless I really have to. If so, is it safe to jailbreak to the latest firm 3.1.2 i think, any hidden surprises to that, dont wana find out after the jailbreak. Like some firm changed my Baseband in the past I thought the world just stopped spinning or something. lol


------ EDIT-------
Others can hear me if i have the headphone wire attached and speak into the mic in the wire.

[Melech518]

Most likely a flex cable issue. You will need to replace it.

When you press the volume buttons on your iPhone with out the headphones plugged in do you see (headphones) in the volume bar? If so it is the flex than needs to be replaced. This is most likely not the mic, but if it is then that can be replaced as well.

[midniter]

I dont understand u sir

When i press volume up or down i see the default "ringer" icon, no headphones

[mrmacc]

just press up and down during the call, not in standby mode

[ianbroste]

blow into the headphone jack, or blow compressed air in their. Sometimes junk can get stuck in the headphone jack.

[midniter]

NO flux/ flex sign here
No blowing , take headphone wire in out fast.... didnt work

With Headphone wire mic others can hear me. If I get a mic lets say from Buy.com, I'm gona attach pic to show wot kinda mic it is. Will this work for me ?

http://www.buy.com/listing/sellerlis...?sku=212941666