Tracking the phone
No matter what some people say, curiosity is inherent in each of us in one way or another. And you can even not notice how automatically you start flipping through someone else's phone book or messages if you have someone's mobile phone in your hands. Perhaps your brain will not even record the information you see while the hands are making automatic actions. But the fact remains. And if you show a little attention and connect memory? You will certainly get a lot of information about the owner of the cellular device. That's why the surveillance of a person by phone number becomes so popular every year. But only people, unfortunately, forget that this action is illegal.
However, in some cases you can start to conduct photo-video surveillance of a person without fear, if you are concerned about its safety. But this applies exclusively to the safety of under-age children and incompetent relatives. Therefore, if you are worried about how to arrange a spying on a person through the phone, then you just need to use the services of private detectives. But again, again, that only within the law and in relation to a certain category of people.