Malcolm Owen, Apple Insider:

Published on Thursday by the U.S. Patent and Trademark Office, Apple’s patent application for “Detection of spoofed call information” proposes a system where an iPhone or other mobile device could perform checks on a call to ascertain if it is genuine, then either warn the user of the problematic call or prevent it from disturbing the phone user at all.

This is a pretty interesting read. Seems like Apple is on to something here. God bless ’em if they can reduce the scourge of spam calling.