I think that is your problem, if I try to enable Smart Remote 'Trusted places' without wifi or mobile data on I get a pop-up message saying "Turn on internet to access 'trusted places'" and it won't work until I do.
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So you need to at least switch your mobile data on.
I always have my wifi on so have never had that message before, but I've just been trying various combinations of GPS and geolocations on and off to see what happens. As I said earlier, I can't rely on getting a GPS fix when indoors which is why my wifi is always on. I have 1GB data on mobile so only use that when absolutely necessary.
I do have mobile data turned on, unless you mean for location purposes. But I don't see an option for just GPS and mobile data. All the options include WiFi, which I don't want.



