If you can't pair the watch with your phone, check if the Bluetooth connection is lost and a Bluetooth disconnection icon will show up on the main watch face. “Please Connect to App” will appear on the Notifications widget. On the COROS app, you can’t manually sync the data by pulling down Today’s page.
Please follow the steps to fix the Bluetooth connection.
- On the Device page from the COROS app, tap on the watch image and locate the “Remove” option down below. Tap on it to remove the device from the COROS app.
- On your smartphone’s Bluetooth connection page, forget/delete the watch.
- Restart both the phone and the watch.
- Pair the watch to your phone via the COROS app.
Alternatively, you can try performing a hard restart on your watch. Press and hold the CONFIRM button for at least 15 seconds, or until you see the COROS logo. This will not reset your watch or delete any data.
Invalid QR code issue:
The QR code page on a functioning watch will list the 6 digit device ID in the format of "ID: 123ABC" once the watch is disconnected from the phone.
Access the QR code page on your watch via System > Pair Phone.
If the device ID is missing or replaced with "vx", you will not be able to pair the watch with your phone anymore. Scanning the invalid QR code will receive an error message "This device is not supported". Please reset the watch a few times and check if the issue remains. If so, please contact email@example.com and list the following info to begin the replacement process.
- A copy of the product order receipt
- Current shipping info
- Product model/color/size info
- A photo of the invalid QR cod
- COROS account email
- 6 digit watch ID
- Settings > Privacy > Bluetooth > COROS > ON.
- Bluetooth Pairing Request > Pair
If you deny the request, the watch will still be able to pair with your phone. However, the connection will become very unstable and disconnect easily.
One way to tell if your watch is not properly paired with your iPhone is by checking the Bluetooth setting. If there's no "i" icon next to the paired device, it is likely connected incorrectly. Please follow the link below to remove it from the COROS app and restart the pairing procedure.
For Android users experiencing connection issues every time the Bluetooth is restarted, please try changing the Bluetooth AVRCP protocol version in Developers settings and restart the phone.
Apk link for direct download of the COROS Android app via https://d31oxp44ddzkyk.cloudfront.net/apk/426242068348780544.apk
Android 10 issues:
Unfortunately, there has been a known occurrence with Android 10 users on Bluetooth connection issues, including failure to reconnect after disconnection. COROS has made no changes to the COROS app and products in terms of Bluetooth connectivity. After testing and investigation, we have concluded that the Bluetooth connection issue was caused by the Android 10 Bluetooth compatibility affecting all device types with BLE connection.
It is unfortunate that as the manufacturer of Bluetooth devices, COROS has limited solutions to fix this unless Android releases new updates to Android 10 users to improve the Bluetooth compatibility. Android is known to release major updates without fully testing the compatibility with all devices. Good news is that Android may release a new update soon.
Although this isn’t an issue with the watch itself, here are some solutions to help in the meantime.
Please make sure to update the Android 10 system version once new updates are available. COROS engineering team is also in contact with Android team for this matter.
You can also try the following steps to see if they fix the issue temporarily. It’s not guaranteed but this is the best we can do for now.
- Remove the watch on the COROS app.
- Restart the phone.
- Enter airplane mode on your phone.
- Enable GPS.
- Wait for 30 seconds and exit airplane mode.
- Pair the watch on the COROS app via "pair manually" instead of scanning the code.
NOTE: Bluetooth headsets use Bluetooth 2.0 (Classic Bluetooth) and smart wearables generally use Bluetooth 4.0/5.0 (BLE). These two protocols and systems are different.