No one can hear me talking but I can hear them talking on my Iphone 4?

[Blake.17]

I'ts not the microphone because voice memos work and when I use viber it works perfectly. I've tried turning it on and off, restoring it, updating it to the latest software and nothing has helped. Can anyone help me fix this problem?

[Santy]

For once, make sure 'mute' is not pressed. Probably less chances for it but still you should check it once. Also check that there is no pocket lint in the headphone jack. This also results in this kind of problems. If all these are ok, than probably you should reset / restore your phone.

As you said, you updated it to latest sofwatre, probably it would be iOS5. As i have heard many people facing many problems on their iPhone 4 with iOS5, you should degrade it to its previous firmware. For more torubleshooting, check out this Apple Article.