The Global Navigation Satellite System (GNSS) provides precise positioning and location services for contemporary cellphones.
The word “GNSS” refers generally to any of the satellite-based global navigation satellite systems (GNSS) that exist today. These systems use signals from orbit to broadcast positioning and time information to devices, allowing them to autonomously establish their own locations.
The most well-known GNSS systems include China’s BeiDou Navigation Satellite System, the Global Positioning System (GPS) of the United States, Russia’s GLONASS, and Europe’s Galileo.
As each of these systems has extensive worldwide coverage, the likelihood that a smartphone will be able to connect to satellites is increased if it supports all of them.
By utilising Wi-Fi and cellular radio, devices without built-in GNSS receivers may nevertheless roughly determine their location by scanning the nearby access points and cell towers. This position data, in contrast to GNSS, is not precise enough to be utilised for navigation.