updated 11:10 pm EST, Wed January 27, 2010
Developer claims support on iPhone app
Apple has allegedly lifted the VoIP restrictions with the latest iPhone 3.2 SDK, according to the developer iCall. The new SDK features several utilities geared for development on the new iPad platform, however it also appears to have quietly enabled VoIP communication across 3G networks. Developers had previously been limited to running VoIP apps only on Wi-Fi Internet connections.
iCall has already updated its self-titled iPhone app to support the new 3G calling functionality. It remains unclear if the app will remain available, as the iPhone SDK is still in beta. Apple explicitly warns against using beta SDKs as a basis for apps that will be submitted to the App Store, as certain APIs may not make it into the formal release.
Other VoIP developers, such as Skype, have yet to modify their apps to take advantage of the 3G support.