I have done a these tests:
* Data OFF, Wifi OFF: It works perfectly without updating the map nor the route.
* Data ON, Wifi OFF: It works perfectly updating the map and route if you have coverage.
* Data ON, Wifi ON: It works well until you reach a zone with many wifi networks when the car freezes. The map and route update until it fails.
* Data OFF, Wifi ON: It works well until you reach a zone with many wifi networks when the car freezes. The map and route don't update.
In conclusion: With wifi ON it fails sometimes and with wifi OFF it works always, and it doesn't depend on if data is ON or OFF.
I think GPS in Ubuntu Touch fails when it has to manage many wifi networks, not a few.
I have done a these tests:
* Data OFF, Wifi OFF: It works perfectly without updating the map
nor the route.
* Data ON, Wifi OFF: It works perfectly updating the map and route
if you have coverage.
* Data ON, Wifi ON: It works well until you reach a zone with many wifi
networks when the car freezes. The map
and route update until it fails.
* Data OFF, Wifi ON: It works well until you reach a zone with many wifi
networks when the car freezes. The map
and route don't update.
In conclusion:
With wifi ON it fails sometimes and with wifi OFF it works always,
and it doesn't depend on if data is ON or OFF.
I think GPS in Ubuntu Touch fails when it has to manage many wifi networks, not a few.