With iOS the easiest way to make sure it off and stays off is to build a shortcut to cut off wifi/bluetooth. Otherwise it's typically off until you get geolocated as being back home/work and wifi comes back on.

I have a "store mode" button that just kills wifi/bt that I hit before I go into any store.

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mcosta 3 hours ago | parent [-]

what do you gain doing this?

	▲	officeplant 2 hours ago \| parent [-]
		Peace of mind that I'm not being tracked around the store by wifi/bt, and/or having my device fingerprinted for further identification on future visits.