WSJ.com - Motorola Unveils New Phone Combining GSM and Wi-Fi

WSJ.com - Motorola Unveils New Phone Combining GSM and Wi-Fi "Motorola Inc. yesterday unveiled a phone that combines cellular and wireless Internet-calling capabilities. The device, called the CN620, which could be the first mobile phone that combines wide-area GSM cellular technology with shorter-range technology known as Wi-Fi, or wireless fidelity, could open the floodgates for users to steal away significant minutes from cellular networks and place free calls over the Internet.
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Motorola says its new device will still work after leaving the Wi-Fi "hot spot," because the call will simply hand over to the regular cellular network, using the wireless technology called GSM. That means that a user -- instead of having a cellular number and a work number, for instance -- can have just one. Though the phone will be initially aimed at business users, Motorola envisions the technology working in consumers' homes as well, allowing people to take a single phone number with them wherever they go."