isn't the simpliest way to increase eprivacy simply to turn off phones when we leave the house, when we don't expect a call?

yeah the next step is to just leave it at home, as there are many anti theft features that phone have to track it while it’s turned off. but at that point, why even a phone?

privacy is about balance and forgoing certain pieces of data for specific services. you find what you feel comfortable with and then resist giving more information than needed.