Coverage maps
How to read a 5G coverage map
A coverage map is a picture of where a mobile network has been planned, measured, or both. This guide explains what those pictures can and cannot tell you.
What a coverage map actually shows
A mobile coverage map places network information on geography. Some maps are published by operators and show where they expect a technology to be available. Others are built from devices that recorded what they connected to. Both are maps. They answer different questions.
An operator map is a planning and marketing document. It is useful for understanding where a network is intended to exist. A measurement map is a record of what phones observed. It is useful for understanding where people using those phones actually attached to a network.
Operator maps and device measurements
Neither source is universally more accurate. A planning map can include places a phone has not recently measured, and it can also include places where the lived experience is weaker than the color on the map. A measurement map only knows the devices, times, and places that contributed observations. Empty space on a measurement map often means “not measured here,” not “no network.”
5G Signal Finder is built to add the measurement view: observations contributed by people using the app. Use it as a real-world perspective alongside operator maps, not as a replacement that settles every coverage question.
How to read an observation map
- Technology: 4G, 5G NSA, and 5G SA are different kinds of connection, not shades of the same thing.
- Place: an observation belongs to the area where the device recorded it, which may be outdoors, in a vehicle, or indoors.
- Time: networks change. A point is a record from a moment, not a permanent promise.
- Density: more observations make a pattern easier to see. A single point is an anecdote.
When the live dataset is connected, country and carrier pages on this site will show only measurements that the production API returns. Until then, this website does not draw a coverage map from invented numbers.
Limits to keep in mind
Phones differ in bands, antennas, and software. A flagship and an older phone on the same corner can record different technologies. Indoor walls, vehicles, and congestion change what you experience without moving the tower. Crowdsourced maps also follow where contributors go, so highways and city centers usually appear before rural paths.