AGPS limitations & tips
Your phone uses Assisted Global
Positioning System (AGPS) satellite
signals to estimate your location. If your
phone cannot find strong satellite signals,
your AGPS might be slower, less accurate, or
it might not work at all. AGPS provides only an
approximate location, often within 150 feet
(45 meters) but sometimes much farther from
your actual location.
To improve AGPS accuracy:
• Go outside and away from
underground locations, covered
vehicles, structures with metal or
concrete roofs, tall buildings, and
foliage. Indoor performance might
improve if you move closer to
windows, but some window sun
shielding films can block satellite
signals.
• Move away from radios, entertainment
equipment, and other electronic
devices that might interfere with or
block AGPS satellite signals.
• If your phone has a retractable
antenna, extend the antenna.
• Hold your phone away from your body,
and point the phone antenna toward
the sky. Do not cover the antenna area
with your fingers
AGPS uses satellites controlled by the U.S.
government and subject to changes
implemented in accordance with the
Department of Defense AGPS user policy and
the Federal Radio Navigation Plan. These
changes might affect AGPS performance.
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