Wifone - Wifone is a VoIP app for iPhone and iPod touch. It lets you add multiple SIP and IAX2 VoIP providers in order to make cheap calls all over the world.
Wifone supports calls using your phone's WiFi or 3G connection. In addition, you can send SMS via WiFi, 3G or EDGE.
· Multiple SIP and IAX2 accounts
· Codecs: G