With the intensification of the epidemic in China, each of us relies more on the itinerary code and health code in our daily lives.
In order to avoid the positioning of the itinerary code, some people have begun to rack their brains to evade the positioning of big data and lie about the trajectory of the trip. I advise everyone not to think so, because this is not only futile, but also violates the epidemic prevention regulations and causes hidden dangers to society.
Many people think that the trajectory of the itinerary code is achieved through mobile phone positioning.
I just turn it off, then the itinerary code will not show my tracks, is this really the case?
In theory, the shutdown can indeed hide the trajectory of the travel code, but in practice it is not.
After most Android phones are turned off, everything in the phone will be interrupted, and naturally there will be no internet connection.
Everyone has set an alarm clock, even if the computer is turned off, the alarm clock can still ring. This shows that after the phone is turned off, a small number of programs are still running. So shutting down doesn't mean all programs stop!
If the phone has the function of turning off the device to find the device, it means that the phone has a separate chip, which is used to prevent the phone from being lost when it is located.
Since this chip is independent, even if it is turned off, it can still run, so the mobile phone with this function can still be positioned after it is turned off.
Apple phones, for example, have a separate Always-on Processor (AOP), which is a small, low-power chip. Even if Apple's mobile phone is turned off, the chip is still running, and its role is to locate it.
So when the Apple phone is turned off, you can see such a reminder!
If you don't turn off the phone and just turn on airplane mode, will the itinerary card not be recorded?
Turning on airplane mode is 100% positioned. Because airplane mode ostensibly turns off all network signals, such as 2G, 3G, 4G, 5G signals. But only for normal phone calls and traffic networks.
In airplane mode, the phone can still make emergency calls like 119 or 120. This proves that the phone is actually connected to the network, but only rejects all network connection services except emergency calls.
If I unplug the SIM card, will the itinerary code also be recorded?
If you want to understand this problem, you must understand what kind of way the mobile phone is located.
All mobile phones are positioned in three ways.
The most common is base station positioning. The network that the phone can connect to outdoors is entirely through a nearby base station.
The mobile phone can locate the accuracy position through three base stations, which is the triangulation method.
The distance can be calculated by the time difference between the base station and the mobile phone, if it is only a base station, the distance between the mobile phone and the base station can only be calculated, but the specific where the mobile phone is is not clear.
A base station calculates an infinite number of points, which are any point on the sphere with this distance as the radius. Since we are in a space of three dimensions, the location of the mobile phone can only be finally determined through three base stations.
Even if the mobile phone card is unplugged, the base station can still be located, because our mobile phone has a unique IMEI number at the factory, which can be queried through *#06#.
As long as the mobile phone is turned on, it will try to access the base station, even if there is no SIM card, as long as the base station can recognize the IMEI number of the mobile phone, it can be located!
Can you hide in the basement without a signal, block the connection between the base station and the mobile phone, and thus avoid the travel code?
In fact, even if there is no base station positioning, there is satellite positioning. Satellite positioning does not mean that the mobile phone can transmit signals to the satellite, but the mobile phone receives the time information from the satellite transmission, and the mobile phone can automatically calculate the position information by receiving the time data transmitted by the four satellites.
The signal power of the general mobile phone is not enough to transmit a signal to the satellite, only a special satellite phone can!
Even satellite positioning signals are blocked, and there is WIFI positioning.
Hiding in the basement, there may be no cell phone signal, but you can only use the phone through WIFI. Each WIFI is signaled by a router, and each router has a globally unique MAC address. This address will also eventually expose the location of the phone.
So what can be done to be completely untargeted?
In fact, the answer is very simple, all electronic devices need energy to operate, if there is no energy support, no matter how powerful the positioning is futile.
Therefore, to avoid the tracking of the travel code, you can only deduct the battery of the mobile phone. But now the mobile phone and the battery are one, buckle off the battery, the mobile phone is basically scrapped.
Many people confuse the itinerary code with the health code!
Many people think that the itinerary code and the health code are the same technology.
I thought that my health code was marked orange or red because I was located in the same time and space as the confirmed person. In fact, the principle of health code is very simple, that is, it is marked by the degree of risk in the region.
In addition, the epidemic prevention personnel will register through offline mapping, and after discovering the close contacts, they will use the background to mark the health code. Therefore, the color of the health code is not singlely marked by positioning.
Finally, I would like to emphasize that big data only helps us to carry out accurate epidemic prevention, and there is no need to worry about privacy!