Some months ago we covered Nimbuzz for the iPhone. The company now announced that they will also offer their service, even without available 3G or Wi-fi, after they closed a deal with Belgian service Voxbone. Thanks to the new offer from Nimbuzz, VOiP and Skype now also are available over 2G. The service will offer a local area number to call over 2G and then Skype contacts and VOiP is available. With the Skype application for iPhone you need to be connected to a Wi-fi network.
Nimbuzz is also available for several other smart phones such as the Nokia N97 and phones based on the Symbian platform.