Portronics Harmonics Twins S18 — Troubleshooting Guide

TABLE OF CONTENTS

• Quick Troubleshooting
• 1. Earbuds Do Not Turn On
• 2. Bluetooth Is Not Connecting
• 3. Only One Earbud Is Working
• 4. No Sound After Bluetooth Pairing
• 5. Touch Controls Are Not Responding
• 6. Calls Are Not Working
• 7. Voice Assistant Is Not Starting
• 8. Music / Game Mode Is Not Switching
• 9. Earbuds Are Not Charging
• 10. Charging Case Is Not Charging
• 11. Battery Backup Seems Low
• 12. Earbuds Keep Disconnecting
• 13. Earbuds Enter Power-Saving / Switch Off
• Still stuck?

Quick Troubleshooting

1. Earbuds Do Not Turn On

1. Place both earbuds in the charging case.
2. Make sure they are seated correctly.
3. Remove the earbuds from the case.
4. Check whether they automatically power on.
5. If they do not respond, charge the case and earbuds before retrying.

2. Bluetooth Is Not Connecting

1. Open Bluetooth settings on the phone/tablet.
2. Forget Harmonics Twins S18 if it is already listed.
3. Turn Bluetooth off and on again.
4. Remove the earbuds from the case.
5. Search again for Harmonics Twins S18.
6. Select the earbuds to pair.
7. Keep the phone within approximately 10 metres during testing.

3. Only One Earbud Is Working

1. Place both earbuds in the charging case.
2. Confirm both earbuds are charging correctly.
3. Remove both earbuds together.
4. Forget the existing Bluetooth pairing.
5. Pair Harmonics Twins S18 again.
6. Test music playback on both earbuds.

4. No Sound After Bluetooth Pairing

1. Confirm the earbuds are connected.
2. Increase the phone's media volume.
3. Make sure the earbuds are selected as the active audio output.
4. Pause and restart playback.
5. Reconnect Bluetooth if the issue remains.

5. Touch Controls Are Not Responding

Use the controls as follows:

• Single tap: Play/pause or answer/end call.
• Press and hold about 2 seconds: Reject an incoming call.
• Double tap Right: Next track/video.
• Double tap Left: Previous track/video.
• Triple tap: Switch Music/Game mode.
• Press and hold about 3 seconds: Voice assistant.

Make sure the earbud surface is clean and that each tap is performed clearly.

6. Calls Are Not Working

1. Confirm the earbuds are connected to the phone.
2. Check that Bluetooth call audio is routed through the earbuds.
3. Make sure both earbuds are properly worn and connected.
4. End the call and reconnect Bluetooth if required.

7. Voice Assistant Is Not Starting

1. Confirm the earbuds are connected to your phone.
2. Make sure the phone's voice assistant is enabled.
3. Press and hold the relevant earbud for about 3 seconds.
4. Try again after reconnecting Bluetooth.

8. Music / Game Mode Is Not Switching

Triple tap the Left or Right earbud to switch between Music and Game modes.

If the mode does not change:

1. Make sure the earbuds are connected.
2. Perform three distinct taps.
3. Wait for the mode confirmation prompt.
4. Retry if necessary.

9. Earbuds Are Not Charging

1. Place the earbuds correctly in the charging case.
2. Check the charging contacts for dirt or obstruction.
3. Connect the case to power using the supplied Type-C cable.
4. Confirm that the case shows its charging indication.
5. Allow the case and earbuds enough time to charge.

10. Charging Case Is Not Charging

1. Check the Type-C cable connection.
2. Try another suitable power source.
3. Check the charging cable for visible damage.
4. Make sure the Type-C port is clean and dry.
5. Allow approximately 2 hours for charging.

11. Battery Backup Seems Low

Actual runtime can vary depending on:

• Volume level
• Calling frequency
• Music/Game mode
• Bluetooth usage
• Usage conditions

Fully charge the earbuds and case before testing runtime again.

12. Earbuds Keep Disconnecting

1. Keep the connected phone within approximately 10 metres.
2. Reduce obstacles between the phone and earbuds.
3. Make sure the phone is not switching to another Bluetooth device.
4. Restart Bluetooth and reconnect.
5. Place the earbuds in the case and pair again if necessary.

13. Earbuds Enter Power-Saving / Switch Off

After remaining connected for around 5 minutes without activity, the earbuds may reduce activity, and placing them in the charging case switches them off.

Remove the earbuds from the case and reconnect them when you are ready to use them.

Still stuck?

If the issue persists after performing all troubleshooting steps, please raise a support request.

Our support team will assist you further.

Support

• Visit: www.portronics.com
• Support Portal: support.portronics.com