I cant hear no sound on my 6300 even thow i buyed a new speaker an fitted it in it still dont work

It might be the speaker but have you checked the settings or profiles because it might be on silent or If you go to the settings and go to sounds or something similar you should be able the change the sound settings and make it louder or quieter but i don't know if this will work but it should but if it doesn't it's probably the speaker Hope this helps.

Was it working before?
If so, (a) fade control is not in the center or (b) Unit or speaker is broken
If it never worked, then check wiring

try attaching another speakers and try...
if ur headphone is working in the same outjack of sound then it's ur speakers that's out...

Sound issues are existent withinin vista onwards as is decreased from normal as with xp and previous. To fix problem of this depends on installing an appropriate os system...

it is very simle my dear, if you know how to open your fon then do it, buy a new microfon of a cellshop , then replace it

just check the problem area
first go to sound setting by click on sond icon on task bar and set the speaker on.
if not get possitive result then chech sond by using head phone make sure sound drivers working properly or not if not then reinstall the sound driver

have you installed the sound driver?
if you dont know which sound card it is you can use this program to find out 
http://www.belarc.com/free_download.html
then you must look for the corresponding driver

My headphone is also giving me problem. i can hear sounds from my speaker if the heardphone is not inserted but if inserted when working it does not affecting anything, Even the soundof my headphone is bad.pls kindly post me a solution

I had the same problem b4 it turns out my speaker pin is broken. U have to buy a new speaker coz u can't solder back the pin once it's broken. Just buy the speaker and change it yourself, it's really really easy trust me. I've done it b4, I can show u how to do it.

buy a same size speaker from electronics market and replace in the phone