Engineers have developed the GhostTouch device, which allows you to "click" on touch screens without contact
The method works at a distance of up to fourcentimeters from the screen. The fact is that capacitive touch screens detect touches by a change in capacitance at the point of contact - an electric charge flows to the user's finger. In fact, you can influence the screens not only with your fingers, but also with electromagnetic interference of a certain frequency. In particular, electromagnetic radiation with a frequency of 46 megahertz is suitable.
Scientists have learned to imitate single clicks,and swipes. They warned that this technique can be used by an attacker: without the knowledge of the owner, unlock the phone or click on malicious links.