I've had my Blackberry Pearl since February. Never had any major problems with it. I don't drop my phone, or throw it, or anything like that.
The last time I talked on it was yesterday afternoon, and everything went fine. Today, I went to call someone and it was completely silent other than a glitch of the other persons voice every once in a while. So, then I called back, and put it on speakerphone, and it worked perfectly.
Any idea what could be wrong?