According to CEO James Tagg when the final version of the software is released users will be able to switch between Wifi and SIM calls without interruption.
You can see a demonstration of the VoIP call here
Yes it’s true; a company called Truphone was able to make a call from a “locked iPhone” using an IP connection established through a Wifi connection. The fact that iPhone users will now be able to make VoIP calls whenever they are within a Hot Spot is incredible news!
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