Under normal conditions with a strong signal, wearable GPS devices are accurate within 3 meters (10 feet) of your actual location. However, environmental factors such as heavy tree coverage, tall buildings, or refraction from large bodies of water can interfere or block the satellite signal and cause discrepancies with distance, pace, and the GPS track recorded by your device.
Tips for getting the best GPS data
Wait before pressing Start
On the start page of an outdoor activity mode, wait until the satellite signal icon turns solid, indicating a full signal is acquired. For best results, let the GPS "soak" for another minute even after it has acquired signal before pressing Start.
Change satellite modes
On your device, go to System > More Settings > Satellite Systems to change satellite modes. All Systems On is recommended for most scenarios, but when traveling through areas where a strong satellite signal is more difficult to obtain (such as canyons, forests, or urban areas with tall buildings) we recommend switching to Dual Frequency (available on DURA, PACE 3, PACE Pro, APEX 2 Pro, VERTIX 2, VERTIX 2S).
For APEX 42mm, APEX 46mm and PACE 2, we recommend using either GPS/Glonass/Beidou or GPS/Glonass/QZSS.
Standard GPS mode should only be used if you need to preserve battery life. Because this mode only connects to one satellite system, results may not be as accurate in certain environmental conditions where the satellite signal may be blocked or refracted.
For more information on when to use different satellite modes, check out our article here: When to use different GPS modes
Pause your activity when indoors
If you are recording an outdoor activity with GPS and need to go inside a building, we recommend pausing the activity. Otherwise, the device will continue actively searching for GPS while indoors, causing issues with the distance and GPS track.
Troubleshooting GPS issues
Update the device's satellite data
With updated satellite data, your device already knows to look for specific satellites that are expected to be overhead. But if you have traveled a far distance or have not synced your device to the app in several days, the device cannot perform this targeted search and instead needs to perform a broader search, which takes much longer. Because of this, check the Profile page of the app for the update satellite data prompt, and attempt to connect to satellites from your device to ensure it has updated satellite information for your new location.
What is GPS satellite data? Satellite data is a schedule showing where satellites are and how fast they're moving. GPS devices use this schedule to figure out which satellites are above them, helping them pinpoint locations faster and more accurately. The GPS GNSS Alliance provides this schedule, updating it daily with future satellite positions worldwide.
The COROS app will automatically download the satellite data of the last 7 days and transfer it to your device when both devices are connected. If the device has not been synced to the app in over 7 days, a prompt will appear on your device screen. You can then manually update the data by going to the Profile page (fourth tab) and selecting "Satellite Data" underneath your device name. If this action is not performed, the device can take 2 minutes or longer to obtain accurate positioning data. For best results, please wait in place until this operation is completed.
AGPS Verification Failed
If you have trouble updating the GPS Satellite Data on the COROS app and receive an error message "AGPS verification failed", please follow the step listed below.
- Disable any connected VPN.
- Switch the network on your phone (celluar/WiFi).
- Please change the settings on your iPhone.
- Settings > Safari > Clear History and Website Data.
If none of the above steps works, please restart and reset your COROS device. Make sure to sync the device with the COROS app prior to following the steps below.
- Restart
- Press and hold the Power button for 15 seconds to restart the device.
- Reset
- System > More Settings > Reset > Reset All
- Reset will not delete data saved on your COROS app/account.
Need more help?
If you are still experiencing GPS issues after trying these steps, please submit feedback on the COROS app → Profile page → Customer Support → Contact Support → write down details about the issue and “Submit”.