Interactive Map
Signal Strength Map
Explore real cellular signal strength measurements from users around the world. See where carriers have strong coverage and where signal is weak.
Launch Signal Strength MapInteractive signal strength map preview
Open Full MapMap Features
Understand cellular signal quality in any location.
Real Signal Data
Signal strength measurements from real devices, not theoretical models.
Multiple Carriers
Compare signal strength across different carriers in the same area.
Detailed Coverage
See signal quality at a granular level, including indoor measurements.
Understanding Signal Strength
Signal strength is measured in dBm (decibel-milliwatts). Here's what the numbers mean:
- -50 to -79 dBm: Excellent signal
- -80 to -89 dBm: Good signal
- -90 to -99 dBm: Fair signal
- -100 to -109 dBm: Poor signal
- -110 dBm or lower: Very poor/no signal
-75 dBm
Example: Excellent Signal
Contribute to the Map
Download our free app to record signal strength measurements and help improve coverage data for everyone.
Download the App