Toktumi has launched an iOS 4 update to its VoIP and cellular app, Line2 v2.4. The app allows users to operate a second phone number on an iPhone, supporting VoIP calling when possible and reverting to cellular when necessary, functioning over both Wi-Fi and 3G networks. It can provide voice-calling service via Wi-Fi when AT&T service is unavailable, for users who can't afford to miss a call, or for users who are often in an AT&T dead spot. Line2 can also save cellular minutes on A&T's network, with unlimited US and Canada calling and low cost international calling.
