Barablu is the latest of a string of startups offering free calling via Wi-Fi mobile phones. I’ve been using Gizmo Project on my Nokia N80i for a few months now and it works very well. But what’s new with Barablu’s offering is that it claims to be able to switch you to a GSM network when you leave the area of Wi-Fi coverage. I have not tried it so don’t take my word for it. Download Barablu, try it and let me know.

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