Sorry if this was posted earlier. If you have an annoying contact that keeps calling you (like a bill collector), you can go into that contact, select menu, and then options (not edit contact). In this sub menu is an option called "Incoming calls", checking this box will send this call to voicemail everytime. The phone won't even ring.
Oh, that IS useful! I've got a couple of telemarketers who won't stop calling. All I have to do is add them to contacts(!) and send them to voice mail land. MANY thanks!