The Japanese government announced plans to launch VoIP services running at 15 Mbps for mobile phones by 2007. Japan did not specify which mobile VoIP technology the network would employ. The government expects the proposed network to lower prices of VoIP services and enable data to transfer more than a thousand times faster than the fastest 3G handsets currently available in Japan. Officials expect those speeds to slow down and QoS to weaken if too many people use the service in the same area.
Current mobile VoIP services require the user to connect their handset to the Internet through WiFi hotspots. Google's rumored plans to offer free WiFi hotspots across the US is the closest thing the US has to Japan's mobile VoIP proposal.
For more on Japan's proposed mobile VoIP service:
- take a look at this article from the AP