We have written about converged WiFi-cellular handsets, but WiFi-only handsets are also growing in popularity. When their price comes down, they will become even more popular. The idea of a WiFi-only handset is appealing, but there were authentication and encryption issues to resolve, as well as the problem of handing over between the different types of network. Progress is being made, though, and more and more manufacturers are getting serious about using WiFi networks for voice handsets. Analysis