To fix Bluetooth not working on an Android device, follow these concise steps based on the provided sources:

  1. Ensure Bluetooth is enabled: Swipe down from the top of the screen to access Quick Settings, and make sure the Bluetooth icon is toggled on.

  2. Reboot your device: Turn off your phone and restart it to clear potential temporary errors.

  3. Clear Bluetooth cache:

    • Open Settings.
    • Find and tap "Apps" or "Application Manager".
    • Scroll down to locate "Bluetooth", and tap it.
    • Select "Storage" and then "Clear Cache".
  4. Reset Network Settings:

    • Go to Settings > System > Reset Options.
    • Choose "Reset Bluetooth & Wi-Fi" and then restart your device.
  5. Unpair and Re-pair Devices:

    • Access Bluetooth settings on your phone.
    • Forget or unpair the device you're experiencing issues with.
    • Put the target device in pairing mode according to its instructions (e.g., closing and opening the charging case for earbuds).
    • Pair the device again.
  6. Update Software:

    • Check for system updates on your Android device.
    • Ensure the firmware on your Bluetooth device is up-to-date.
  7. Confirm Proper Pairing:

    • Verify that your Bluetooth device isn't currently connected to another device.
    • Check that both devices are within Bluetooth range (generally less than 33 feet or 10 meters).
    • Avoid placing metallic objects near the antenna or using metallic covers that might interfere with the connection.
  8. Check Phone Audio Option:

    • Go to Settings > Bluetooth.
    • Tap the Settings icon next to the Bluetooth device.
    • Ensure the "Phone Audio" option is checked.
  9. Enable Discoverable Mode:

    • Go to Settings > Bluetooth.
    • Ensure the "Discoverable" option is enabled.
  10. Boot in Safe Mode:

  • To diagnose if a third-party app is causing the issue, boot your phone in Safe Mode and attempt to connect your Bluetooth device.

If none of these steps resolve the issue, consider contacting the manufacturer or seeking professional assistance.