I was reading a thread about this earlier today, and alas didn't bookmark it, or I would continue it... even if the thread is 6+ years old.
Someone was asking if GPS (and by extension, Location Services including changing timezones, etc) worked in airplane-mode.
Since then:
- the FAA has relaxed rules about using mobile devices on aircraft that radiate RF energy;
- new radio chips with different architectures have emerged;
- etc.
While it might have been the case that shutting down the cellular PHY (transceiver) also killed the GPS receiver, that might not be the case today. Or is it a deliberate decision in iOS design that airplane-mode turns off GPS, even though GPS is a passive receiver that doesn't radiate RF, and whether the transceiver/receiver can be enabled separately or not is moot?
I'm thinking of a use-case where a citizen journalist might be photo-documenting events in his country (and wanting to attach time/location metadata to photographs as he takes them) without wanting to emit any sort of RF signature that might allow state security services to track him (i.e. using WiFi certified location services or cellular service for time or AGPS+).
Thanks
