Palm Treo 500 Centro "barely hear callers" Questions

...barely hear the caller.the phone is a couple of months old I hate to sound obvious but have you checked the volume setting? Took me a few days to realize they were there - I almost never read the ...

...hear me. The problem started with the handset (holding the phone up to my mouth), so I had to use only the earphones. Then it started happening with them, too. Sometimes I can reset the phone, and my ...