So I was just informed that there is a hidden menu for the Droid and Droid 2 also might work for the X but not to sure. So what you have to do is goto your dialer and type in the numbers listed below. Ill put the order of operation (steps) on what you do for the better quality as far as the other options listed in the hidden menu I have no idea what they do, Only know how to do this one.
first step: Dial ##7764726 and press send
2nd step: enter 000000 for password then hit verify
3rd step: press option #4 Vocoder
$th step: It should be on EVRC if you highlight EVRC-B then when your on the phone the quality is better but the catch is that it does use more batt. power.
Let me know if this works for all of you and or if you allready knew about this hidden menu.