Re: GPS related
Oh, my bad. Further digging reveals:
Long and the short of it: Cortana does have to have the location services on. Some argue that as this is Windows phone that won't make any difference to battery consumption: "Disabling location services on the OS level doesn't really conserve power in a noticable way." Hmmm, surely it takes more power to check location than it does to not check location...
So sorry for doubting you!