Can't hear other end on phone calls / Poor Audio Quality June 26, 2020 07:08 Updated Adjust the volume on the connected mobile device. Move to another area with better quality signal. Make sure your ZeBuds are fully and properly inserted into your ear. Ensure the mobile device is within 10m of ZeBuds while on a call. Related articles Bluetooth disconnection issues Bluetooth connection issues I can't hear the sound on one of my earbuds, what can I do? What is ZeBuds Pro Water resistance? Can I use one earbud independently of the other?