Rebtel - Cheap international calls 4.4.1 for iOS
Rebtel - Cheap international calls 4.4.1 for iOS - The program, which users can make free calls to each other, or call landlines and mobile phones around the world at competitive rates. Send text messages and call Rebtel users anywhere, no matter where you are. Calls can be made as you connect to the Internet via Wi-Fi, or 3G. Thus, the Rebtel program has an innovative feature "Keep Talking", which will allow users to stay connected even when reception of the internet signal is poor. This effect is achieved by automatically switching to the standard cellular network to maintain a call when there is no Internet access.
screenshots of Rebtel - Cheap international calls
iOS: INTERNET / Voice and Video Calls