This function is combined with China Information Research Institute, China Telecom, China Mobile and China Unicom to obtain the user's location information through "mobile phone positioning".
Then guess, turn off the phone and pull out the SIM card, can you still find the itinerary by big data travel itinerary?
Let's take a look at how the mobile phone is positioned. "Mobile phone location" mainly obtains your location information through these four ways.
The mobile phone will automatically search the surrounding base stations and select the connection with the strongest signal, and the base stations will automatically switch with the change of the mobile phone position.
Positioning technology is to determine the location of your mobile phone according to the signal parameters of the base station to which your mobile phone is connected, such as the arrival time, direction and intensity of the signal.
Every wifi router has a globally unique MAC address. When a mobile phone is connected to wifi, its wifi antenna will detect the surrounding data and provide it to a special location service provider to determine the location of your mobile phone.
In our daily life, we often need to realize the navigation and positioning function through satellite positioning.
Satellites constantly send navigation message signals to the ground in space, and the position of the mobile phone can be accurately calculated by data such as the distance and angle between the mobile phone and each satellite.
There is an IMEI identification code inside the mobile phone. No matter whether your mobile phone is turned on or plugged in, the base station can recognize this code, thus easily locating the location of the mobile phone.
Browse here, I believe everyone has the answer in their hearts. Most positioning needs to be turned on and networked, but like the last fourth case, as long as you have a mobile phone, you can locate it, whether it is turned on or not.
Unless you remove the mobile phone battery and SIM card, your geographical location may be obtained within a few minutes.
But then again, like most mobile phones are all-in-one machines that cannot be disassembled, mobile phones have become a part of our lives. Without a mobile phone, it is inconvenient to travel.
Finally, although we have nothing to hide in the era of big data, friends don't have to worry that travel cards will reveal privacy, because the country also has strict protection mechanisms to prevent this information from being stolen by others ~