Thanks for posting and reaching out to us today. I am very sorry to hear that you are experiencing some poor audio with when on calls and would love to assist you with this.
I would firstly recommend that you perform a full reset on the Soundwear via:
This will clear the devices pairing list so you will need to also forget the pairing list on your mobile device. Please also ensure that the device is running the latest software via the Bose Online Updater.
Please update us on the result of this and if any other community members have had and resolved this issue please do let us know.
Hector B - Community Support
Thank you for getting back to us. I'm sorry to hear that this issue persists.
Could you please confirm if you are connected to just one device or two at the same time?