How do I use the watch button to navigate during calls?

Follow these steps for a good Bluetooth calling experience: 

Android device:

• To mute an incoming call on the watch and phone, press the side button of the watch.
  Note: You will also return to the previous level. 
• To exit an incoming call from the watch and answer it via your phone, press the side button of the watch. 
• also make sure that your phone is connect to calling Bluetooth to use call feature 

iOS device: 

• When there is an incoming call, press the side button of the watch, no response <remove this>
• To hang up a watch dialled number, press the side button of the watch.
  Note: You’ll also return to the previous level in the watch. 
• To exit an incoming call from the watch and answer it via your phone, press the side button of the watch. 
• Also make sure that your phone is connect to calling Bluetooth to use call feature