Plantronics Explorer 320 I can hear but nobody can hear me

First, you need to setup the phone for bluetooth:

- Start on the menu screen
- Select the bluetooth icon
- Select handsfree
- Select add

Now to setup the headset:

- Begin with headset turned off
- Press and hold the call button until the headset begins to flash blue and red.

The headset is now ready. When found by the phone, the plantronics model number will be displayed on the screen. for more information about your gadjet: http://www.plantronics.com/media/media_r...


On the phone:
- Select search
- Highlight the plantronics headset on the list and press select
- Enter "0000" as the passkey and press accept.

If your headset is flashing blue it is paired correctly.
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Ok..try to go your sound settings, maybe the microphone is turned off. OR try to restart your phone just to make that headset is working properly.