Qualification:
I’ve heard various rumors, some of which seem to be true, such as that the phone works even when it’s turned off and maybe records all the time you’re talking, and with neural networks you can find out what you said, even if you were ten meters away from the phone and in another room, you can use the neural network to improve the sound quality and still know What did you say.
There is also information that the phone can see through objects, so gluing something to the camera will not help.
I don’t know what to do, I’m scared. Do you have any ideas on how to save myself from this if I live in the city and use my smartphone?
Well as Rob Braxman put it, say you live in a dense country and Apple wants to find your specific phone, it will be possible down to a few feet because of Apple’s BLE network. Even if you have an entire city of people with iPhones off, only one of them need to have their phone connected to internet for everything to work.