LittleAngel08,
In general, the typical user cannot track another users cell phone. There are some exceptions:
1) Your cellular service always can (by GPS if it's on, by trangulation if GPS is off);
2) Law enforcement can (in the USA, at least), with a warrant or in a demonstrable emergency OR when you call 911 (most modern phones automatically turn on GPS when 911 is called);
3) Some cellular services offer a GPS tracking service for parents; and,
3) In some cases and for some phones there is tracking software, which sends data back to a central site where the phone's location can be tracked over the web or via the software manufacturer's special application. Typically this is used by companies tracking employee travel/location during the work day.
Here are some examples of the latter two:
http://www.accutracking.com/http://www.mymobilewatchdog.com/Cheers,
LHerrou
