I'm having trouble with my hands-free Bluetooth headset

You may be experiencing any of these issues:

Your Bluetooth headset is not responding.
Your Bluetooth headset sound quality is unacceptable.
Your Bluetooth headset does not function properly.
The headset that came with a Sony Z2 device does not work with your phone.
Your Bluetooth stops working over your car speakers.

Note: Headset models from many manufacturers work with HTC phones with varying degrees of stability and quality. The headset that is bundled with the Sony Z2 phone has a proprietary pin that is not compatible with your phone, regardless if HTC BoomSound is on or off.

Low battery power can degrade audio performance. Make sure the battery levels of the Bluetooth headset and your phone are at least one quarter of a full charge.

The distance between your Bluetooth headset and your phone can also cause audio issues. Follow these steps to keep the headset and phone at a suitable distance:

Keep the Bluetooth headset within ten feet from your phone. Preferably, the two should always be near each other, in contact with your body.
If there is some distance between the Bluetooth headset and your phone, avoid obstructions from furniture and walls between them.
If you have a single ear bud style Bluetooth headset, keep it on the same side of your body as the phone.

Note: If the headset falls out of effective range from the phone and then gets closer again, the Bluetooth link may not be automatically re-established and you will need to re-connect.

Poor signal or signal interference can cause audio issues. Follow these steps to improve your phone's signal:

Avoid radio interference from Wi‍-Fi access points by moving away from Wi‍-Fi transmitting devices.
Turn off non-essential Bluetooth transmitters in computers or elsewhere.
Step away from any currently running microwave ovens. Your HTC phone should show four bars of signal in the upper right corner of the screen.

Ensure the phone is fully updated. Follow these steps:

Go to Settings > About > Software updates. The exact path may differ depending on your phone.
These are the three typical paths:
- Settings > About > Software updates
- Settings > System updates > HTC software update
- Settings > AT&T Software Update
Tap Check now to check for updates.
- If an update is available, follow the onscreen instructions.
- If no update is found, confirm the phone is on the latest software version. Go to Settings > About > Software information.

If your Bluetooth stops working over your car speakers and enters privacy mode, try the following:

Un-pair and re-pair your phone.

Note: This issue seems to happen with Ford Sync and some other built-in Bluetooth car systems. The issue seems to be that something on the phone is forcing the car kit into privacy mode. Please check with your car's manufacturer for further assistance.

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