How do you turn up the volume?

well bad news you cant but you can plug in your speaker in the mp3 jack and it should work

It's not you. it's your mic. Clean it out with a toothpick. BE GENTLE. Blow softly.Turn the toothpick slowly while you clean. if the issue persists, it's THEIR volume. tell them to turn up their headset volume.

Have you tried turning the mp3 player volume to full?

Try checking it with another set of headphones. If they do the same then the headphone socket has been damaged.

first, verify your headphones are working. to do this, find another know working set and test. once you know they are working, verify unit has full charge and volume control is set up. If still not working, port has likely broken solder. If out of warrant, you can disassemble and solder yourself if qualified.

The ringer volume and mp3 player volume are too low.

It might be that the contacts for the headphone jack is very dirty. Try using a cotton swab with a wd-40 on it to clean the inside contacts on the jack.

someone probably put a password in the volume control thingy
to change just go to settins and then where it says volume
if you cant go in it might be somone changed the password

Are they .mp3's or .wma's? I haven't gotten .wma's to play, but .mp3's work fine.

You may also want to try creating a folder in the player that contains your music. Shouldn't matter, I know, but you know what that's worth.

Try to plug the auxilary cable all the way in.