The Wall Street Journal published an article today detailing the contents of letters sent by the Federal Communications Commission to Apple, AT&T, and Google regarding the pulling of an application that facilitates the use of Google Voice services on the iPhone.

I don't subscribe to WSJ, so I can't read the whole thing. Thankfully, CNN Money has given us the low down. One letter requests information from Apple about the nature of the application and whether or not AT&T was consulted on the matter. The inquest is part of a broader investigation into the exclusivity agreements manufacturers have with carriers.

FCC Chairman, Julius Genachowski, said Friday that the FCC "has a mission to foster a competitive wireless marketplace, protect and empower consumers, and promote innovation and investment." He also said that they are looking into the rural markets where customers avoid high-end devices due to carrier exclusivity.