take off clear plastic that comes on phone...it's covering the speaker.
hahaha.. this is what fooled me.. i didn't want to take it off yet until i got a screen protector.. but trust me this is the problem..
(there still might be problems with other ppl..but i dunno..)
EDIT: i also installed the audiopara after doing this and it seemed to increase it a little more..i'm in a noisy dining area and i still put volume at 1/2-3/4 of the way and can hear it loud and clear
i also attached the audio fix found at
http://forum.ppcgeeks.com/showthread.php?t=41385