T-Mobile Germany is starting a pilot launch of T-One, a service similar to one due to arrive in the US this summer. Using phones such as the Nokia e60 and n80, subscribers will be able to use T-Mobile's GSM and UMTS networks as well as seamlessly switch to T-Com's Wi-Fi hotspots for both calls and data access. When the service launches T-Mobile will also offer compatible PC cards and laptops for data-only users, and are expected to launch additional handsets. T-One is not based on UMA as suspected, but rather on SIP (Session Initiation Protocol). T-Mobile US is expected to offer subscribers a compatible Wi-Fi access point so they can use compatible phones over Wi-Fi in their homes in addition to Starbucks and other T-Mobile hotspot locations.
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