Depends on the implementation of the device!
On many devices, you can specify behavior when accessing the Location API. (Nokia s40 allows you to search for bluetooth gps devices, for example.)
If the location API can use data such as cellID, LAC, ... (if you specify low accuracy criteria), it depends on the implementation of the device and even if your operator allows you to use these values. ( http://www.easywms.com/easywms/?q=en/node/3589 )
API , gps.