If you live in an authoritarian country that can disappear you for protesting you should turn off your phone or use a burner phone. I am not sure if protesters

If you live in an authoritarian country that can disappear you for protesting you should turn off your phone or use a burner phone. I am not sure if protesters in places like Hong Kong know that China could be logging BT or WIFI mac addresses and later connect that address with a real owner.