Location-Based Services limitations

To acquire a location fix, you must be connected to the Sprint network, (subject to change) not roaming, and, for the initial fix, in 1X coverage.

If you're outside with a clear view of the sky, the USB modem uses MS-Based position location technology. Weather conditions may affect your ability to get a clear view of the satellites and thus to acquire a GPS fix. MS-Based GPS (Basic) is for outdoor use only.

Note:

Location-Based Services use Advanced Forward Link Trilateration (AFLT). AFLT is a type of device-based position location technology. Unlike A-GPS, AFLT does not use GPS satellites to determine location. Instead, the device takes measurements of signals from nearby cellular base stations (towers) and reports the time/distance readings back to the network; the readings are then used to triangulate an approximate location of the device. In general, at least three surrounding base stations are required to get an optimal position fix.

AFLT accuracy may vary, depending on the geometry of the cell towers in your location.

What GPS mode options are supported?

GPS on a Sprint data card works like any other GPS device. Sprint provides two types of GPS mode: GPS Basic, and GPS Premium.

For more information, see “What is GPS Basic?” and “What is GPS Premium?” on page 89.

Note:

Sprint Location Services may not be supported if Network Mode is set to 1xEV-DO Only or (subject to change) if you are roaming. To use Sprint Location Services, ensure Network Mode is set to Automatic or 1XOnly, and ensure that you are in the network coverage area (not roaming).

What is GPS Basic?

Sprint GPS Basic supports GPS outdoors. Your USB modem requires an unobstructed view of GPS satellites (in the sky), and, like any other GPS device, might not perform well within forested areas or near tall buildings.

Sprint GPS Basic is based on GPSOne™ standards and uses Location-Based Services for the first, fast, GPS fix. GPS coordinate values are made available to applications via a local GPS NMEA Com port.

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Section 3E: Frequently Asked Questions (Windows)

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Sprint Nextel 595U manual Location-Based Services limitations, What GPS mode options are supported?, What is GPS Basic?