Handset offers dual mode functionality

It's possibly the first device to provide cellular and WiFi capabilities, but even if it misses attaining that landmark feature, the Sereno UM-1, a GSM/Voice-over-WiFi dual-mode handset, will have a price point few others will be able to beat--likely under $100. The new handset provides simultaneous multi-mode functionality that supports SIP and Unlicensed Mobile Access modes for Voice over Internet Protocol. According to the vendors that collaborated on the handheld device (Quorum Systems, TTPCom and Analog Devices), the handset doubles the WiFi range for voice applications in comparison to current VoIP technology. Article