AGPS during an emergency call
When you make an emergency call, your 
phone can use Assisted Global Positioning 
System (AGPS) satellite signals to tell the emergency response center your approximate location.
The AGPS feature has limitations, so always tell the emergency response center your best knowledge of your location. Remain on the phone for as long as the emergency response center instructs you.
AGPS might not work for emergency calls:
•Your phone’s AGPS feature must be working (see page 35 for how to improve accuracy).
•Your local emergency response center might not process AGPS location information. For details, contact your local authorities.
For best results:
•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 cannot find strong AGPS satellite signals, the location of the nearest cell tower in contact with your phone is automatically provided to the emergency response center.