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Setting up Call Function
Pebble Cosmos has Bluetooth call feature, hence comes with dual Bluetooth connectivity.
To use the call feature, please pair your smartwatch with your phone first via the “Date app” and then connect the audio again as stated below
How to set up the call feature of your SmartWatch
On standby, swipe down on your SmartWatch and click on the audio/call icon on the control centre (Shown in the image) and turn on the audio status. Then tap the Bluetooth option on your phone to open the device search page and select Audio_PBLCosmos. Once connected, your phone will show connection successful (refer to the image).
On successful dual pairing, the watch will sync the contact and call data from your phone. Now you will be able to receive and make calls from your SmartWatch.
To make a call from the Pebble Cosmos, swipe left on standby to reach the dialer & call history page (refer to the images).
Battery Saving Tips
You can connect the Smartwatch with your phone through the app and disconnect the second Bluetooth connection, used for Bluetooth calling. This will let your Smart Watch track all your health vitals and will run longer.
https://manuals.plus/pebble/pfb06-cosmos-smartwatch-manual#ixzz7qX3A9tkI