The VoIP feature is a bonus for iPhone users, until now only works on WiFi. Apple recently opened VoIP call over 3G network, unfortunately the popular VoIP client Skype has not updated its version. fring user can however enable Skype to work on 3G.
“fring users and our team alike are very excited that Apple Inc. have allowed independent iPhone VoIP applications over 3G networks, letting users make voice and video calls over whichever internet access suits their needs at any given place and time,” said Avi Shechter, Co-Founder & CEO of fring in a statement released today.
I am not certain that Push notification and video chat work for Skype users. Other Skype features and functions are included in Fring.
Of course, the best use of Skype VoIP call versus your carrier cellular voice is for oversea calls. Skype offers inexpensive rates.