The Global Navigation Satellite System (GNSS) provides precise positioning and location services for contemporary cellphones.
Any worldwide system of satellites that broadcast signals from space to devices to provide positioning and time information so they may establish their own location is collectively referred to as the Global Navigation Satellite System (GNSS).
The most well-known GNSS systems are China’s BeiDou Navigation Satellite System, Russia’s Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS), the USA’s NAVSTAR Global Positioning System (GPS), and Europe’s Galileo.
A smartphone that supports all of these systems is more likely to have easily accessible satellites to connect to because they are all worldwide in coverage.
When combining Wi-Fi and cellular radio, devices without integrated GNSS receivers can nevertheless obtain approximate position data by scanning nearby cell towers and access points. This position data, however, is not precise enough to be utilised for navigation, unlike GNSS.
