Google Voice VoIP service has returned to Apple's iTunes App Store in the form of two third party apps, GV Mobile + and GV Connect.
Previously Apple had banned the official Google Voice app from the App Store, as it allow users to make cheap calls and send free text messages using an iPhone's data plan.
This angered Apple and AT&T, the exclusive data services provider for the smartphone.
Google had responded by launching a web-based version of the service, making it impossible for Apple to block it.
There have also been a number of unofficial Google Voice apps available at the Cydia iPhone app store - but they only work on jailbroken iPhones.
This time, however, the two apps have been officially approved by Apple, and are available for download from the App Store.
Users can access their Google voicemail box and make VoIP calls directly from their iPhone phonebook. They will get a Google Voice number, which can be used to make and receive phone calls and send text messages.