Earlier this month, Apple rejected an application for the iPhone called Google Voice. The uproar set off a chain of events—Google's CEO Eric Schmidt resigning from Apple's board, and the Federal Communications Commission (FCC) investigating wireless open access and handset exclusivity—that may finally end the 135-year-old Alexander Graham Bell era. It's about time.

With Google Voice, you have one Google phone number that callers use to reach you, and you pick up whichever phone—office, home or cellular—rings. You can screen...