My lg tone headset will not connect anymore, the blue light comes on and stays on but it will not allow you flash red and blue to connect anymore

Just leave it like that or buy a new one just press the disable button .

Hi, Ephraim. The flashing red light indicates that the device is showing "low battery". It could be that the LG phone charger fits the charging port on your bluetooth headset but it is not compatible with your device. In order for you to know that it is charging, the device should show a steady red light(means charging).
Please take a look at the table reference below.
----------------------------------------------------------------------
•With the Charger Plugged In
______________________________________________________________________
•Headset Indicator Headset Status
Red-----------------------------------------------Charging (battery level less than 50% charge)
Yellow-------------------------------------------Charging (battery level more than 50% charge)
Green--------------------------------------------Charging complete
----------------------------------------------------------------------
======================================================================
======================================================================
======================================================================
----------------------------------------------------------------------
With No Charger Plugged In
__________________________
Headset Indicator Headset Status
______________________________________________________________________
Off ---------------------------------------------Power off
Three blue flashes------------------------Powering on/off
Steady blue --------------------------------Pairing/connect mode
Rapid blue/purple flashes -------------Connection successful
Quick blue flash --------------------------Incoming/outgoing call
Slow blue pulse --------------------------Connected (on a call)
Slow blue flash ---------------------------Standby (not on a call)
Slow red flash ----------------------------Idle (not connected to phone)
Slow purple pulse -----------------------Connected call muted
Steady red ---------------------------------Attempting to connect
Quick red flash ----------------------------Low battery

Note: After 20 minutes on a call or of inactivity, the light stops flashing to conserve power, but the headset remains on
----------------------------------------------------------------------

Hope that'll help you in some way.
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Indicator Lights:
1.Headset Status Headset Indicator Light
2.Powering on Steady blue, then intermittent flashes
(changes to standby mode)
3.Powering off Red appears and goes off
4.Standby Blue intermittent flashes
5.Charging battery Red solid light. Light indicator turns off when
battery is fully charged and headset is off.
6.Low battery Triple red flashes
7.Pairing mode Blue/red alternating flashes
8.Missed call Purple flashes. Press the call control button
to cancel flashing light.
9.Incoming call Triple blue flashes when ringing.
Power on and off:
1.Turn on the headset Press and hold the call control button until the
indicator glows blue. You will hear ascending
tones.
2.Turn off the headset Press and hold the call control button until the
indicator glows red. You will hear descending
tones. When power is off, indicator stays off.
If none of this is helpful then it may be that your battery is dead, if that is the case then you will need to replace the whole headset. The battery's are not replaceable.

Good luck from Headsets Direct!

You will need to turn off your headset and then press and hold the power button until the LED starts to flash red/blue, red/blue, it will stay in this state for a few minutes.

Good luck from Headsets Direct - 800-914-7996.

When you turn on your headset, the blue light indicates it's on and
the three red flashes indicates a charged headsets. If it's not
turning on after that, try resetting the headset (turn off and on).
Turn it off by pressing the call control button until the indicator
glows red (you'll hear descending tones). Once off, turn it on in the same way (you'll hear ascending tones).

Good luck from Headsets Direct!

The following are for TB-20EL model. But it works in general for plantronics as well. For step 3 make sure your headset is in pairing mode. When you hold the button 6-8 sec, it should turn either solid blue or blink.
for tb-20el:
1. ensure that your phone's bluetooth feature is on
2.Ensure that the headset is off(press and hold button on your headset (called multifuntcion button) for 2-4 sec, teh indicator light will flash red)
3. press and hold the multifunction button for 6-8 seconds until the indicator light alternately flashes blue and red
4. set your phone to find new device
5. Ente rpin '0000' (four zero) then press OK or yes
6. this should complete the pairing.

Plantronics Explorer 320
Indicator lights: Blue Light Flashing.

TheBlue light flashing indicates that your headset is working normally. There is no way to turn it off without turning off your headset.

Headset Status Headset Indicator Light

Powering on: Blue light flashes.

Powering off: Red appears and goes off.

Charging battery: Red solid light.

Low battery Red flashes.

Pairing mode: Blue/red flashes for 120 seconds.

Missed call: Purple flashes. Double press the call control button to cancel.

Ringing: Purple flashes. Briefly press call control button to answer the call. Press call control button for 2 seconds to reject the call.

Here's the link to your user guide:
http://www.retrevo.com/d/df/explorer300series_en.pdf?doc=178a4266e3e80dd257e740b75b59b3ad&ts=1265516774335

If you found this information helpful, please give me a big thumbs up when you rate my answer. Thanks!

1. Turn headset off (panel 5).
2. Hold down the headset’s MFB until the red and blue lights
flash and you hear 2 rising tones, followed by 4 more tones.
Important: Wait for all tones and for both lights to flash. This
may take up to 15 sec. Release the MFB.
3. Follow the manufacturer’s instructions for putting your
cellular phone into Bluetooth discovery mode.
4. Wait 5-15 sec. while the devices discover each other.
When the phone discovers the headset, select “Pair” and
enter a passcode of 0000 when instructed. When pairing
is complete the headset’s blue light will stop flashing and
the phone will prompt you to ‘connect’ to the headset.
Enter “Yes” on the phone to connect to the headset. When
connected, the blue light will flash indicating that the
headset is in standby mode ready to receive a call.

USER GUIDE

To get it into pairing mode (flashing red and blue) turn the headset off.  Hold the main button down until the light goes red and then off.  Then push and hold that same button and keep holding it even after the blue light comes on.  It will now go into pairing mode, flashing red and blue.  Set your cell phone to find it and it should work.

I have the same model, and if you turn it on and the light stays on, usually after a flash and about 10 seconds, your headset isn't paired with your phone. You need to re-pair it with your cell phone, the code is 0000. That should work.