A while back I started receiving unwanted automated calls on my Motorola Android phone at night.  It was an automated service calling my number frequently.  It was only a recorded voice on the other side.  I didn't want to turn off my ringer incase a call I was expecting came through.  It's easy to effectively block a number on your android phone without installing any apps.  Just follow these steps: [more]

  1. Add the number as a contact.
  2. Edit the contact.
  3. Tap the menu button and then select "Options".
  4. Select "Send calls directly to voicemail".

That's it.