Ask AI: Is it true that it is not possible to track the location of a phone inside the subway?

Determining a phone's location inside the subway using GPS can be challenging because GPS signals generally do not penetrate underground well. They rely on a direct line of sight to satellites, which can be blocked by tunnels and other structures. In some cities, though, there might be technology in place to provide location services within the subway system, such as Wi-Fi-based tracking or beacons. However, the accuracy may not be as precise as GPS under open sky. It's also important to note that privacy laws and regulations apply, and tracking a device without the owner's consent is usually illegal.