Hey Burg5,
We understand that when using Bluetooth headphones, the volume never fully lowers or mutes. We'd like to help with this. If you haven't already, restart your iPhone to see if that helps: Restart your iPhone
If the issue continues, unpair your Bluetooth headphones and set them up again: Pair a third-party Bluetooth accessory with your iPhone, iPad, or iPod touch
If you're still having trouble, let us know more details:
- Does this happen when you pair the headphones with another device? If so, you'd want to reach out to the headphone manufacturer.
- Does the same behavior happen with other Bluetooth audio devices connected to your iPhone?
The more details you can provide the better we can help.
Take care.