How Can I Reset My Plt M155?

1 Turn the headset off.

Press and hold the call control button until the indicator turns red and then turns off.

2 Turn the headset on.

Press and hold the call control button until the indicator light continues to flash red and blue. The headset is now in pairing mode.

3 Use the commands on your phone to locate your headset.

For most phones, select Settings/Tools > Connections > Bluetooth > Search > 2XXPlantronics. See your phone’s user guide for more information.

4 When prompted for the passkey, enter 0000.  Pairing is successful when the indicator on your headset flashes blue.

Your headset is now connected and ready to use.

If not successfully paired after 10 minutes, your headset automatically powers off. When you turn the headset on again, it automatically goes into pairing mode until successfully paired with a Bluetooth phone.

If you're not able to pair the headset, you may have a defective product.  Try pairing on a different phone.  If it still doesn't pair, you should have the unit replaced.