How to Test Your Phone's GPS
Last updated: August 2026
Why GPS testing matters
GPS is critical for navigation, ride-sharing apps, location-based services, and emergency calls. A faulty GPS antenna or sensor can cause inaccurate locations, slow satellite lock, or complete failure to determine your position. Testing early helps you catch problems before they become urgent.
How browser GPS works
Modern browsers use the Geolocation API to access your phone's GPS hardware. The browser requests your location, and the device combines GPS satellites with Wi-Fi and cellular data to calculate coordinates. The browser test reports latitude, longitude, accuracy in meters, and which data sources are available.
Step-by-step test guide
1. Open the GPS test
Navigate to the GPS Test page. When prompted, allow the browser to access your location. Without this permission, the test cannot run.
2. Wait for satellite lock
After granting permission, the test will attempt to acquire your position. This may take 5–30 seconds indoors. For best results, stand near a window or step outside where satellite signal is stronger.
3. Check the results
The test displays your latitude, longitude, and accuracy radius. An accuracy of 10 meters or less is excellent. 10–30 meters is acceptable for most use cases. Over 50 meters suggests a GPS problem.
4. Compare with the GPS test page
Open the dedicated GPS Test Page to see additional details like the number of satellites in view and signal strength. Multiple tests over a few minutes give a more reliable reading.
5. Test related sensors
Run the Motion and Orientation Test and Compass Test to verify the full sensor stack. GPS relies on complementary sensors for heading and movement data.
Common GPS issues
Slow satellite lock: Can be caused by a weak antenna, old Assisted GPS data, or being indoors. Try clearing the A-GPS cache in your phone settings or testing outdoors.
Inaccurate location: If the accuracy radius is large (over 50 meters), the GPS antenna may be damaged or the device may be relying heavily on Wi-Fi positioning, which is less precise.
No location at all: If the browser cannot obtain a position even with permission granted and outdoor conditions, the GPS hardware may be faulty.
Run a full diagnostic
If GPS is not the only concern, run the Device Diagnostic to check all hardware components and get a complete health report.