On your phone, open the Settings app and tap Bluetooth (or Settings > Connections > Bluetooth). Make sure Bluetooth is turned on (the button should be blue). Check your Bluetooth device and make sure it's turned on and in discovery mode. Wait for it to show up under Available Devices on your phone.
Step 1: Tap Trusted Devices on the Smart Lock panel. Step 2: Tap Add Trusted Device located in the bottom right corner. Step 3: Tap on a listed device. Note: You can only add Bluetooth devices that were already paired with your Android phone.
In the Device Manager, locate the Bluetooth entry and expand the Bluetooth hardware list. Right-click the Bluetooth adapter on the Bluetooth hardware list. If the Enable option is available, click that option to enable and turn on Bluetooth in the pop-up menu that appears.
Unpairing from a Bluetooth device
Go to System > Preferences > Hardware > Sound then go to Hardware panel and select your device. You can then test your device. Use default Ubuntu Bluetooth Pairing. Wait for some time and you'll see that Ubuntu has recognized your Bluetooth speakers as headsets.
Rename a Bluetooth Device From the Settings
Once you forget a device, the phone will not show it in the list of devices on Bluetooth. To Unforget the device, you need to reset the network settings. To do that, open your phone's Settings and then scroll down to “System.” From the System tab, you will see “Reset Options” from where you should reset the phone.
To add a trusted device to your Apple ID, simply sign in to a new iPhone, iPad, or Mac with your Apple ID. You will receive a 6-digit code on one of your already trusted devices. Once you verify the new device entering the code sent to your other device, this new iPhone, iPad, or Mac will be added as a trusted device.
Here are some steps to fix a problematic iPhone Bluetooth connection.
To unpair a Bluetooth accessory, tap Settings > Bluetooth, find the device you want to unpair, and tap the info button , then Forget this Device. This will remove the accessory from the list of available Bluetooth devices.
Pair a Bluetooth headphone, car kit, game controller, or other device
To connect devices to your iPhone via Bluetooth, On your iPhone, go to Settings→Bluetooth and tap the Bluetooth button on. The Bluetooth screen opens. Tapping On makes your iPhone discoverable, which means other devices with Bluetooth turned on can see your iPhone.
Steps to add a device via Bluetooth in Windows 10
2 Pair Bluetooth