Microsoft Lumia 640 - Positioning methods

Positioning methods

Your phone shows your location on the map using GPS, GLONASS, A-GPS, WiFi, or network

(Cell ID) based positioning.
The availability, accuracy and completeness of the location info depend on, for example, your

location, surroundings, and third party sources, and may be limited. Location info may not be

available, for example, inside buildings or underground. For privacy info related to positioning

methods, see the Microsoft Mobile Privacy Policy.
The Assisted GPS (A-GPS) network service and other similar enhancements to GPS and

GLONASS retrieve location info using the cellular network, and assists in calculating your

current location.
A-GPS and other enhancements to GPS and GLONASS may require transferring small amounts

of data over the mobile network. If you want to avoid data costs, for example when travelling,

you can switch the mobile data connection off in your phone settings.
WiFi positioning improves positioning accuracy when satellite signals are not available,

especially when you are indoors or between tall buildings. If you're in a place where the use

of WiFi is restricted, you can switch WiFi off in your phone settings.

Note: Using WiFi may be restricted in some countries. For example, in the EU, you are

only allowed to use 5150–5350 MHz WiFi indoors, and in the USA and Canada, you are

only allowed to use 5.15–5.25 GHz WiFi indoors. For more info, contact your local

authorities.

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