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Microsoft Experiments With Mobile Social Networking: Page 2 of 4

The feature does not require a GPS, or global positioning system, device. SLAM determines location based on the cellular towers the phone detects.

To prevent privacy invasion, people can hide their location, or set who can see where they are and when. The location service, however, is on by default, and has to be disabled by the user.

Once installed, SLAM by default will run in the background when people turn on their phones. Users can choose not to have the service run automatically.

Because SLAM uses a cellular network's data pipe to send and receive messages, Microsoft warns potential users that they need an unlimited data plan to avoid a phone bill that could reach as high as $600 a month or more.

The SLAM user interface by default shows the four groups with the most recent activity as thumbnails of the most recent pictures sent. People can also choose the groups that show up as thumbnails and access a list of all their groups.