My Jabra bluetooth headset GNM-OTE3 is fully charged and it is able to connect but it doesn't have sound when I make a call. I couldn't hear the other person's voice at all. I don't know what happened. Can you please help me ASAP? THank you.

Jabra provide a pairing guide for a number of devices.
Support - Pairing Guide - Jabra

Your use of 0000 is correct, perhaps the specific details will help.

I can confirm that the headset works. Suggesting two steps:
1) Confirm that you are holding both the power button AND the answer button for at least 5 seconds. When you release both buttons, the light will go on steady. Does the light go on steady? (If not, you may have a headset problem.)

2) Turn on bluetooth on your phone. Then "search" for the (now with light on) headset. (If the light is off, repeat step 1). The moto should discover the headset, and connect. It may prompt you for a pin...and the default pin code is 0000.

Hope that helps. dw

not a radio communications issue

Hello sir, honor to make you know that GNM-OTE3 is not a valid model of jabra products. try to identifie your product first you can post a photo for it and I can help you in the future. Bye

Here is a link, Jabra website does not have this old of a headset on its page still;
http://docs.google.com/viewer?a=v&q=cache:DndMEBE6HEIJ:www.qla.com.tw/Download/Jabra%2520User%2520Manual/BT2050_User%2520Manual.pdf+jabra+gnm+ote3+instructions&hl=en&gl=us&pid=bl&srcid=ADGEESi_V1RJxE6LIifKa5dSbfInA4057-4yBAeoBS-ABNlL5EaIlQIhedWa8aNHLnZK4T-wVTJSi_RvEqUyyWzX5J-ZrMjvbLxG7S8LMaCfvDvBCsOExddhX3usBdLwfYKK_wpgxCp7&sig=AHIEtbS7C_QO_tNXkCtROjuTfqzEWAaKdw

hold the answer button and the power button in for 5 seconds until you get a solid light, then add device to your phone and follow thru with the pairing procedures as prompted on your screen

pin code 0000 (4 Zeros)

pairing simulator

http://jabra.pairx.co.uk/?l=28

Go to this site, and it will walk you through each step to connect your particular Jabra headset with your cellphone. Choose the headset, and then at the next page, choose your phone. Moving your mouse over each step will change the picture to what you should be seeing on your phone at each step.
http://jabra.pairx.co.uk/ Pls come back and let us know if this solved your problem.

password is 0000

Have you already tried to put your headset in pairing mode first? Anyway, to do it, starting with it turned off, press and hold the on/off button for some 5 seconds, until the indicator light is steadily lit (it will flash as it was being turned on, but don't release the button at that phase). Then, make your phone'sbluetooth application search for new devices. After a while, your headset should appear on-screen. Select it and make it connect. If a pairing code (or PIN, or passkey) is requested, enter '0000' (four zeros);
By the way, if your headset's user guide happens to be missing, feel free to download it from this location.
Hope you are able to sort your problems out.