I take my phone with me into the forest when I go to water tomatoes at my secret tomato growing spot. the phone is connected to data all the time. Can TEA (tomato enforcement administration) trace my location using GPS and find the route where I moved? If so, what can I do to prevent it? I would hate to lose my tomatoes.
If your phone is turned on and getting signal, then its pings to the cell towers is being recorded by your service provider. If later subpoenaed, they would turn over those records and the tomato police could triangulate where your garden is.
Either do not take it. Or if you want it for emergencies put it in a faraday bag as someone said. I would not trust it just being in airplane mode or even turned off but not in a bag.