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Harware that can straddle wireless LANs and cellular networks

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This story appears in the December 2004 issue of Entrepreneur. Subscribe »

The dream is a world where phones and other mobile devicesseamlessly hand off your calls according to the availability andspeeds of different networks. Integration of services like VoIPwill not only create more flexible work environments, but couldalso save you money by transferring calls to the least-costnetwork.

Making this a reality requires cooperation between cellularservice providers, software developers and hardware manufacturers.The first hybrid device debuted this fall, focusing on data ratherthan voice services. , with T-Mobile, recentlybrought out the $499 (street price with activation) iPAQ h6315Pocket PC. Stocked with , a removable keyboard and anoptional camera, it can hop from a cellular network to faster Wi-Fifor data transfer when available.

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