Yes, both earbuds and cult.sport smartwatch can be paired with your smartphone at the same time in dual connectivity mode.

• You can also switch your call audio from smartwatch to your earbuds or phone in between a call. 

In order to do that same, please follow the below mentioned steps:-

• Open the Bluetooth option in your phone.
• Connect & pair your Bluetooth accessories with your phone.  
• If you wish to switch the call audio from your cult.sport smartwatch to other bluetooth accessories or to your phone, you can click the audio button on your calling screen and select your preference.