Note: During an update, your watch will automatically disconnect from Bluetooth, and will reconnect once the update is complete.

1. How to update my watch.

Method 1: Connect your watch to the phone using the NoiseFit Ace . Open the NoiseFit Ace , go to settings, select colorfit Ultra and then click on check for update. Follow the onscreen instructions to update your watch.

2. Check the network signal quality of the area where the user is located. The call signal may be poor if the network connection is not stable. Advise the user to try making calls in an open area with stable network connection.

3. If the issue persists, unpair your watch from the phone, then pair the watch with another phone, and try again. If issue can be well received, it indicates that there is an issue with your phone's Bluetooth. It is recommended that you change another phone. If the issue still persists, this is an issue with your watch's Bluetooth.