I have a p168c. when i call out, the receiver can't hear me well.

1. In settings try to turn up the volume.
2. Using a Q tip and some alcohol make sure the mouth speaker is clear.
3. Check with Telco to make sure the telephone line itself is working properly.

ur speaker has gone it happend to me many times... just go to a repair shop he will fit a new speaker

Your explanation of the problem is not too clear.
If you receive a call and you cannot hear your caller but your caller can hear you, your speaker is bad and will need to be replaced buy phone technician.
If it is that you can hear your caller but they cannot hear you, then your mouth piece is bad and need to be replaced.
Because of the Miniature nature of the Cellphone circuit there is user serviceable part

Hello there,

There are two ways on how you can hear the caller. One is through the earpiece and one is through the phone's speaker.

Are you able to hear the caller but just not clear or with static sound? If yes, then you have a problem with the earpiece of your phone. You can test this by putting it to a speaker phone. If you can hear the caller clearly then you should have your earpiece check. Usually this problem is caused when the earpiece is often moisted or get wet. Try blowing a canned air on the earpiece.

Please let me know how this goes. Thank you for using FIxYa.

take you phone to a cell phone tech and they can put a new speaker in it.
if your oysters didn't damage the main board.

There is solution by changing speaker ! contact for repairman at omniarepair at gmail dot com

model p168c its like the microphone is off or muted

My earphones don't work. Nothing doesn't seem to be broken. Just doesn't work. Have to watch movies on speaker now. Really annoying.

You need to change the ear speaker.

most of the time it is the speaker which has the problem. or it could be a device interfering with the phone when u recieve a call. for example wireless internet or speakers