The handset will work over hotspot networks allowing Vonage customers to use their service while roaming. Boingo and Vonage had a deal in place to test out VoIP over Wi-Fi hotspots, but it?s unclear here in the late evening how that ties together. Also, Vonage?s site doesn?t yet list the announcement, so we don?t know if they?ve partnered with various networks to ease authentication.
Skype is another option.