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The almanac contains information about the location of 
satellites, their operational status, and other satellite 
information. Keeping this information updated 
enhances the performance of your GPS feature. In 
most cases, your phone will be able to get a fix in 
strong satellite signal conditions with outdated almanac 
data, but it may take longer. 
If your satellite almanac data is out of date, your phone 
may prompt you to update it. Follow the instructions 
that appear on the phone’s display. You may be asked 
to go to a Web site or call a customer service number.
Using GPS With Map Software
You can use the GPS feature of your phone to provide 
approximate location data to a laptop computer or 
similar device that is running interactive map software 
such as that made by DeLorme or Microsoft. This way, 
if your phone has good access to GPS signals, your 
approximate position on a map can be made available 
as you travel in a vehicle.
To do this, connect your phone to your laptop (or other 
device) with a data cable and set your phone to 
transmit data (see “To connect your phone to your 
laptop or other device:” on page 128)
. Your phone then 
provides your approximate location to the device 
running the map software, which displays your location 
on a map. Your phone provides an updated location 
every second and the map software displays your 
changing location on its map.
See “Enhancing GPS Performance” on page 125 for 
more details on obtaining good location information.
Note
When you make an emergency call, your phone 
does not rely upon the almanac to determine your 
location.
Note
Because your phone is continuously determining 
your location, using the GPS feature of your phone 
with map software uses the phone’s battery power 
quickly.