iCall App Enables GSM to WiFi / VoIP Switching On The iPhone

From iPhone Hacks -

iCall is a newly announced app coming out on Apple’s App Store. It promises seamless call switching between VoIP via WiFi and regular calls. There will be no hacking involved, they are fully approved Apple developer. iCall has a two tier system with a free version and a ‘pro’ version with added features. iCall is their own service provider so don’t expect to use this application with any of your current VoIP plans like Vonage.

Source Article here.