2. If the mobile phone has flight mode, basically all mtk domestic mobile phones have this function. The flight mode is mainly used in airplanes, and it is turned on, but there is no communication network to send and receive, that is, you can't send text messages or make phone calls, and the flight mode is turned on, and the instrument can't detect it.
3, conductive metal objects will also have interference, but only interference. After the mobile phone is detected, it is said to be a key, and there is a certain chance that it may be let go. You can put the mobile phone in an iron box.
Extended data:
1. The mobile phone detector is a device that can emit fundamental wave signals, receive the second, third or even higher harmonic/combined wave signals from the target for re-radiation, and judge, identify and detect the target mobile phone.
2. Compared with the mobile phone signal positioning device, the mobile phone detector can not only obtain the fundamental channel information of the target, but also obtain 2 times, 3 times and higher information. The mobile phone can detect whether the mobile phone is turned on or off, and its main detection objects are metal nodes and PN nodes in the mobile phone.
3. In the early days, mobile phone detectors were only used in the military field. With the increasing demand for this technology at home and abroad and some new situations in the international community, it has begun to have new applications.