Whoa! Don't go wasting your carrier's money on a replacement just yet.

Check your messages. All of them--voicemail, email (all accounts), text messages.

That annoying, undefined, every-ten-minutes beep that doesn't sound like your other beeps is your "Unanswered Messages" beep. It's not controlled from the "Sounds" menu under settings, it's controlled by a setting in the pocket outlook, and it ignores your universal settings.

If you don't have unread messages, there's a setting somewhere for "clear message counter" but I can't remember where it is and I think there's one for each kind of message. As a last resort you can just take out your battery and reboot the thing but it shouldn't require a brain-erasing master reset.

That frozen clock, though, is not a problem I saw when I had the same thing happen to me.

--(F)PU