In a key shift in policy, AT&T told the FCC on Tuesday that it would allow users of the Apple iPhone to use voice-over-Internet protocol (VoIP) and other Internet calling software to place web-based calls through AT&T’s 2G and 3G wireless networks. The announcement comes in the midst of an ongoing FCC investigation into the decision of Apple, Inc. to block the Google Voice application from the iPhone store and into what role, if any, AT&T played in that decision. (AT&T is the exclusive licensed distributor of the iPhone for the U.S. market.) Responding to that probe, AT&T told the FCC in August that, while it did not ask Apple to block Google Voice, the companies had an agreement “that Apple would not take affirmative steps to enable an iPhone to use AT&T’s wireless service . . . to make VoIP calls without first obtaining AT&T’s consent.” (AT&T told the FCC, however, that it had no objections to iPhone subscribers using VoIP applications to place calls through Wi-Fi hot spots.) At the time, AT&T also told the agency it would take “a fresh look at the issue and . . . promptly notify the Commission of any such change in our policies.” Informing the FCC that it had reconsidered the matter, AT&T confirmed Tuesday that it would consent to Apple “enabling third-party VoIP applications for the iPhone that use our wireless network, including our 2G and 3G capabilities.” Describing the iPhone as “an innovative device that dramatically changed the game in wireless when it was introduced just two years ago,” AT&T Wireless CEO Ralph de la Vega said the decision was made “after evaluating our customers’ expectations and use of this device compared to dozens of others we offer.”