When calling out, person receiving can't hear me but I can hear them. When receiving a call there is no problem.

Hang up and redial the person back sometimes that works

try to put person on speaker phone. If you can hear then your receiver is defective and if you can't hear then, follow instructions here.
http://support.apple.com/kb/ht1414.
Make sure to backup your phone before you do that.

SURE PROBLEM OF MICROPHONE REPLACE IT FROM UR NEAR STORE

try receiving calls from other persons and see if problems still continues.
if it does, contact your customer care immediately

Hello,

You would need to change the speaker phone.

Best regards

the ribbon connector likes to crack in the hinge, go to cell phone doctor or similar and order a new ribbon wire. :) worked for me.....in the mean time you might be able to partially close the phone to hear them.

network problem connect to manually

Hi,

This is a hardware problem. Try to remove the battery and plug in after some time. If that fix it,it' great unless you need to send it for repair.

It might be a issue with IC's, might be blown or soldered out or might be the microphone in the cellphone might needs a replacement/repair.

Thanks for using "Fixya".

This problem I've had myself But it will only solve the problem if your cell uses a sim card. When the sim cards go bad thats whats happens your hear them but they can't hear you or vice-versa.

The problem is from your Ear piece(speaker) change the ear piece.