My first BlackBerry lasted two years - loved it. Fortunately my "new every 2" was available when the kids spilled coffee all over it.
I've had my second BB for 2 months now. Suddenly I can't hear the person I'm speaking with on the phone. I can send and receive calls, the person I'm speaking with can hear me, but I can't hear them.
My warranty is in effect, but I took a good look at my Total Equipment Coverage - $8 per month adds up to $96 per year, or $192 over 2 years, then there is an $89 deductible - AND...............you get a REFURBISHED PHONE in return.
Sorry your phone isn't working right. I can understand about the warranty thing. To be truthful with you, that is one of the reasons I never got the extended warranty. What kind of Blackberry do you have? If the sound quit working all of a sudden, I can think of a few things that you might can troubleshoot, if you want to try?