Microphone does not pick up sound | Bose Sport Open Earbuds
Check for and install any available product updates.
Be sure the phone is not muted.
Be sure you're wearing the earbuds correctly.
Keep your product within 33 feet (10 meters) of your personal device.
Distance and obstacles like walls, doors, or other electronics can weaken the Bluetooth signal. If you're having trouble, try moving your personal device and product closer together or relocating other devices that may cause interference.
Reset your product.
Much like rebooting a smartphone, your product might need to be reset on occasion to correct minor issues. For more information, see Resetting your product.