Thanks for posting. We understand your concern about the communications aspect of the Soundsport Free. The SoundSport Free headphones were designed for single earbud usage while on phone calls. This is a technical limitation of the Truly Wireless Technology that we utilized for the headphones where the master (right) earbud cannot send call audio to the left earbud. This is typical of this technology and there are several other benefits to using this, such as comfort, fit, unrivaled sound quality, as well as convenience. If you have any further questions, please feel free to reach out to your local Bose support. Here is a link you can use. Click on your country, scroll down to "Contact Us"
Thanks again for your interesting in our Bose products.