If you are experiencing audio dropouts or disconnections with your headset while while on a call, please try the following:
Bring Source device to the front side of the body to eliminate body-block interference
The Bluetooth antenna is located on the right side of the neckband underneath the Bose logo. Having the Bluetooth device in a back pocket, bag or a backpack could cause loss of connection.
If using product outside, try moving indoors and check connection again
Outside usage does not have the benefit of boundary reflection or reflective surfaces, so you may be more likely to experience dropouts.
Be sure the Bluetooth headset is within range of the device
Undesired performance may occur if the distance between the Bluetooth headset and the device becomes too great. Be sure the Bluetooth headset is within the recommended 33 foot proximity of the paired device. The Bluetooth disconnect tone will be heard when the Bluetooth range of the device is exceeded. The reconnect tone will be heard once you are within range of the device.
Try another Bluetooth source
If a different Bluetooth source doesn't exhibit the same issue, the problem is with the source device. Refer to the device manufacturer for more assistance.
Check the cellular reception of the phone
A poor or weak connection to the cell service could cause poor audio quality while on a call. Try the call again when the reception improves.
Please Note: The human body can act as a source of interference for Bluetooth and radio signals. Bluetooth sources positioned immediately next to a person (in a pocket, for example) may result in intermittent or loss of connection. For best results have the Bluetooth source closer to the product (i.e. in a front pocket) to reduce the potential for “body-block” interference.