Chapter 4763

The reason why he had asked Charlie and Hugo to call home was because his car was equipped with signal shielding equipment. Once the car left the city, he would turn on the signal shielding equipment to prevent the signal base station from recording the trajectory of the two cell phones.

As all cell phone communication depended on the ground base stations and a large number of ground base stations overlapped each other, forming a communication range with basically no dead-end communication range in the city, the cell phone would automatically adapt to the one with the strongest and best signal among multiple base stations before establishing a connection with it.

When the cell phone continued to move across regions, the cell phone would then search for the base station with the best signal along the way and switch between multiple base stations. This way, the base station would also record the information accessed by this device.

If one wanted to use a cell phone to track a person