when you turn GPS off you are turning off the GPS receiver. You are not however turning off aGPS which does running off the towers for e911. aGPS is a federal mandate to help route mobile 911 calls to the correct 911 dispatch offices.
So, what's the point of GPS reciever? More fine tune?
Not technically correct.
When you turn off GPS, you disable the GPS receiver, yes. But this is used with aGPS. aGPS is a combination of both your GPS receiver, a lot of math and extra processing on Sprint's side, and the mentioned cellular towers.
Note that even if you turn off GPS receiver, it will turn on during an emergency call, by the way.
Anyway, for the OP, you want to go into settings > location > "Use wireless networks" and turn that off, if you want to disable location entirely. (Again, it will still turn on for purposes of 911)
I'm not sure if it uses your assigned IP address to narrow down region, or if the wifi network scanning Google does when taking pictures for street view is used, or both.
when you turn GPS off you are turning off the GPS receiver. You are not however turning off aGPS which does running off the towers for e911. aGPS is a federal mandate to help route mobile 911 calls to the correct 911 dispatch offices.
Not technically correct.
When you turn off GPS, you disable the GPS receiver, yes. But this is used with aGPS. aGPS is a combination of both your GPS receiver, a lot of math and extra processing on Sprint's side, and the mentioned cellular towers.
Note that even if you turn off GPS receiver, it will turn on during an emergency call, by the way.
Anyway, for the OP, you want to go into settings > location > "Use wireless networks" and turn that off, if you want to disable location entirely. (Again, it will still turn on for purposes of 911)
aGPS (assisted GPS) runs on all modern phones regardless if you have the GPS chipset on. aGPS takes the GPS data from the cell site you are on and then based on the neighbors list that is in the PRL it will approximate where you are based on the signal from the other sites. Again not as accurate as having the GPS chipset on, yes on some phones it will turn on the GPS chipset, however in a 911 call, time is of the essence for making that call and aGPS generally does the e911 call routing with the switch
Just to clear things up, in the exchange below Vince Law is entirely correct and opg4749 is entirely incorrect and does not understand the basics of gps implementation on mobiles handsets.
aGPS cannot work at all without satellite fixes. It only uses data from the network to locate satellites (GPS), OPG is confusing trangulation (often eGPS with aGPS and they are two entirely different things. All dumphones have by federal mandate ahve some type of implementation like egps which does not use satellites and is very inaccurate (1000 to 100m at best).