AT&T had no part in the decision to remove Google’s Google Voice iPhone application from the Apple iPhone App Store, according to a 16-page letter the telco sent to the FCC.

AT&T maintains that while it has an agreement with Apple to restrict voice applications that leverage wireless networks operated by AT&T, it retains no control or review privilege for any iPhone application and Apple alone acted to remove the application. In addition, AT&T said the agreement limiting VoIP applications did not extend to VoIP apps that leverage the iPhone’s WiFi capabilities.

In the letter AT&T specifically mentions that part of the initial iPhone exclusivity contract required Apple to block VoIP calling functionality on the iPhone in order to protect AT&T’s monthly service revenues.

AT&T said in the letter that it would take a fresh look at allowing VoIP over its 3G data network as a result of the controversy regarding the Google Voice removal and subsequent FCC probing of its practices related to VoIP.

We use Google Voice, and before that Grand Central, and consider the “telephone number consolidation” service a valuable asset.