I cant hear my voice records

It may be a hardware problem. to check it go to voice recorder in your phone in record any sound and save it and play it. if you hear good quality sound (loud and clear) then it is not hardware problem. try formatting your phone it will do for you.
and if you hear bad quality or not at all able to hear any sound of recorded clip then it is hardware problem. you can not fix it by yourself you have to go to mobile repairing shop and ask them to install new mike in your phone. it india it cost around Rs100-150.
hope this was helpful.
THANKS FOR USING FIXYA.

Press Menu/Select button while phone is not in use.
Press Menuu/Select button to choose Ans System.
Press arrow up or arrow down to choose Ans System Setup, press Menu/Select button.
Press arrow up or arrow down to choose Announcement, press Menu/Select button.
You will hear the prompt "To play press 2, to record press 7. Press 7.
You will hear the prompt "Record after the tone, press 5 when you are done".
You will hear a tone, record your greeting, speaking toward the microphone. Press 5 to end recording.
Your new greeting will be played back automatically, press 5 to end replay, press 2 to start replay again, or press 7 to record again.
Minimum message length- 2 sec
Maximum message length- 90 sec

Below is a link where you can download a copy of the User manual.
http://safemanuals.com/user-guide-instructions-owner-manual/VTECH/CS6229-3-Pre_E

if you cant hear caller voice. do one thing go to gallery and go to voice recorder and record some voice then save that then go to media and play recorded sound if its working means your loud speaker is working but not ear peic means (ear speaker) not working. so then you need to change ear speaker.you can do your self just watch video on online.

You have to select the file to erase hold the erase button and when "ERASE" blinks in the display you have to press the erase button one more time. Do this for each file you wants to erase.

ok so go to menu record and then finish recording itll ask you if you want to

the voice key is on the side of the display screen same side as pwr hold that to record your voice let go when finished

take it technician u need to change its microphone. because it dropped on floor so damage has done with microphone, so take it to technician

Get a new phone, hope you have insurance, or pray it's under warrenty. Face it the mic is dead