I asked this on another thread and there was no answer given except for turning the phone face down. I am wondering if there is a button that can be used to silence the phone ringer. I am interested in this because I am looking for a leather case that I can carry on my belt and want to make sure that the manufacturers include access to such a button in their case designs. (They also need to make sure to give access to the headphones jack, but that is another story.) Having to take the phone out of the case to turn off the ringer is too inconvenient and slow, especially if the ringer is sounding at a very inopportune time.

So, is there a button that can turn off the ringer? If not, can the button next to the headphone jack be program to do so?