Theoretically speaking, unless the user unplugs the battery and removes the SIM card at the same time to avoid being tracked. For some all-in-one devices that cannot be removed from the battery, even if they are turned off, they may be tracked. Simply unplugging the SIM card will only increase the risk of being tracked. It’s just the difficulty of tracking.
Simple questions are answered simply, and we will conduct in-depth research on this issue below, and friends who are interested can continue to look down.
There are three ways to locate consumer-grade mobile phones, that is, general mobile phones.
1 Base station positioning: The mobile phone needs to communicate with the base station in order to know the mobile phone. In order to know the mobile phone, the base station needs the mobile phone to provide the unique identification code of the body. In order for the network to be able to charge the mobile phone (some people will say that it needs to be encrypted, but in fact, the domestic network basically does not use the SIM card for communication encryption), the mobile phone needs to have a SIM card, and the SIM card has a unique identification code for charging. To the phone number. As long as you know which base station has contacted your mobile phone, your location is limited to a small range. This kind of accuracy is about a few hundred meters, which is roughly accurate.
2 GPS positioning: The accuracy is very high, and it can be accurate to within ten meters or even a few meters. It needs the support of the mobile phone hardware GPS template. Now most mobile phones have this template.
3 WIFI positioning: a new positioning method, big software companies now have this kind of technology. The position is calculated through Wi-Fi hotspots, and the accuracy of multi-user indoor positioning is also very accurate. (This is why some software positioning is prohibited by some authority management tools. They can still roughly locate your position, which is calculated by signal and Wi-Fi hotspot.
As far as current consumer mobile phones are concerned, no mobile phone is designed to connect to the Internet when it is turned off, so many people think that the turned off state is absolutely safe. In fact, this is not the case. There are many tools and even software that can be used to "modify" a mobile phone so that it can be connected to the Internet even when it is "off". Many private investigators will use such software to track targets. In fact, this kind of software is not as magical as the legend, its main realization principle is only to seize the authority to switch the machine, when you shut down, the software will fake the illusion of shutting down, in fact, if you do not remove the battery, the phone is still on , The network is still connected.
Of course, this is only from the software level. If someone takes your phone away and makes special hardware modifications, even if there is no software to pretend to shut down and the battery is not pulled out, your phone will still be powered by the battery. track.
As long as the mobile phone is turned on, it will try to register to the network. To register the network, you must first contact the base station, so that the base station will recognize the mobile phone, and then determine whether there is a SIM card and whether it can be registered to the network. Without a SIM card, it is guaranteed that the phone cannot be found directly by monitoring the number, but as long as you investigate the ID of the phone associated with the number, you can find out where your phone was turned on.
Base station positioning is generally just ground positioningMany people may ask, if it is really so good, why the flight is lost, it is because it is basically impossible to locate on the base station on the flight, and the base station positioning is generally ground positioning. Although some crashed flights are not in the sky after the crash, the signal will also be affected by some objective factors, or the explosion will cause damage to the mobile phone, or the signal entering the sea will be shielded, or the signal will not be searched.
Have ordinary users' phones been tracked?Everyone should understand that under normal circumstances, for ordinary users, no one wants to track you deliberately. If you want to achieve location tracking, it is not simple to achieve. GPS positioning requires hardware support and battery. Power supply, after the general consumer-grade mobile phone is turned off, even in a deep sleep state, it is not enough to support GPS positioning. The Wi-Fi location cannot be connected to the network even after it is turned off, so it cannot be located. As for the base station positioning, although there are no restrictions, it requires the cooperation of operators to call data. If it is not for the advanced tracking of state agencies, it is difficult for ordinary people to track others in this way. So, at present, as long as you are not holding one The specially modified mobile phones are not being tracked by state agencies, so there is no need to worry too much.
This is a comment from a netizen:
Finally, let me add that the software tracking we mentioned earlier is the most common tracking method in daily life. Because of the differences in people's mobile phone habits, it is difficult to determine whether such software has been installed, but you can also easily Determine whether tracking software is installed. Generally speaking, GPS and the network are called when such software is running, and the power consumption will be higher in the shutdown state, so if you find that your phone is shutting down for a period of time After time, if the battery is found to be significantly depleted when the phone is turned on, or if the mobile phone is used regularly but the data consumption is obvious, it may be caught. It is best to check.
Of course, no matter how clever the method of judgment is, it is not as effective as being careful when using a mobile phone. When downloading and using software, we should have a good habit of seeing the software permissions before deciding to install it, so that we can Put an end to this kind of malware at the source.
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