Out of nowhere, this bb bold stopped making any sounds when I receive a call. The profile is set to normal, with a ringtone with volume 6, but when a call is received, it never plays anything audible. I've tried a restart, as well as a battery pull, it's still doing it. I don't notice any mute looking icons on the home screen.

What else can I try?

Did it get wet or get dropped?

I don't believe so. Everything else seems to be ok. It froze up a couple times one day, and ever since then it's been silent.

I'd try changing the phone ringtone and having somebody place a test call to you. Also try blowing out the headphone jack with some compressed air. If there is something in there making the phone think headphones are plugged in the phone would be silent.

OK, even weirder now! The phone does audibly ring for one person, and one person only. Gotta be a setting for just that person, or for not that one person somehow? too weird!