"Trip code open!"
"Health code open!"
These two sentences should not be unfamiliar to you! Since the new crown epidemic, these two codes on the mobile phone have been "accompanying" us, they are very important anti-epidemic tools, can effectively record the trajectory of each of us. Have you ever wondered if the itinerary code can find you if you unplug your mobile phone card?
The itinerary code is a communication big data itinerary card, which is launched by the China Academy of Information and Communications Technology in conjunction with the three major operators. It can use the location of the base station where the mobile phone is located, receive data, provide query services for mobile phone users across the country, and can query the information of the prefecture and city that has arrived within 14 days. So as to determine whether mobile phone users have passed through high-risk areas and whether corresponding epidemic prevention measures need to be taken.
The first place of the health code is Hangzhou, Zhejiang, which is based on the actual real data, and after the citizens declare online and register the personal health information, the QR code that belongs to the individual is generated. The introduction of the health code can make the resumption of work and production of the whole society more accurate, scientific and orderly.
So if you pull out your mobile phone card, can the itinerary code find you?
Tracking all your movements, unplugging your phone card, or even shutting down is useless.
So why can the itinerary code still find you even if you pull out your mobile phone card?
This is derived from the base station. In our daily life, we can often see the iron tower standing on the road with a sharp and high point and a moving sign, which is the base station. The base station can send and receive messages through the antenna, which can ensure that our mobile devices can connect to the signal anytime and anywhere, and ensure the network, call and other functions of the mobile phone. Our mobile phones are receiving signals through the base station, its passive skill is to constantly find the base station exchange location, even if you set the mobile phone to airplane mode or disconnect the network, or even unplug the mobile phone card, the mobile phone is still interacting with the base station.
Moreover, there is also a common sense, if you encounter an emergency, even if the mobile phone does not have a mobile phone card, as long as there is a signal, you can still directly dial 110 and other calls for help. Of course, if you are an Android phone, after the phone is completely powered off, the base station can not find you, and the Apple mobile phone because of a built-in ultra-low-power chip, it will make the phone always online, so it can still be located. If you really want to prevent being tracked, you can only do it by removing the battery completely, or destroying the phone.
What do you think about that? Welcome to leave a message in the comments section.