found answer on Plantronics site:
http://www.plantronics.com/us/common/easytopair/#
K100 ---------------------------------------------
- Activate the Bluetooth feature on your phone, then use the phone’s settings to add/search/discover new Bluetooth devices.
- With speakerphone turned off, activate Bluetooth pairing mode by pressing and holding the Multi-function button to turn on speakerphone.
- The LED flashes red/blue to indicate pairing mode.
- Select “PLT_K100” from the list of Bluetooth devices shown on your phone.
- If the phone asks for a passcode, enter four zeros (0000).
- You may see **** on screen.
- Some phones also ask to confirm the connection after pairing.
- The speakerphone LED will stop flashing red/blue once your phone is successfully paired/connected.
903+ ---------------------------------------------
FIRST PAIRING
- Activate the Bluetooth feature on your device, then get it to add / search for / discover new Bluetooth devices.
- With headphones turned off, activate Bluetooth pairing mode by pressing Power/Pairing button on.
- The LED flashes red/blue to indicate pairing mode.
- Select “PLT_BB903+” from the list of Bluetooth devices shown on your device.
- If device asks for a passcode, enter four zeros (0000).
- You may see **** on screen.
- Some devices also ask to confirm connection after pairing.
- The headphone's LED will stop flashing red/blue once successfully paired/connected.
- You can now make a call using your device’s keypad or voice-dialing feature.
SUBSEQUENT PAIRING
- Activate the Bluetooth feature on your device, then get it to add / search for / discover new Bluetooth devices.
- With headphones turned off, press Power/Pairing button until the LED flashes red/blue.
- Select “PLT_BB903+” from the list of Bluetooth devices shown on your device.
- If device asks for a passcode, enter four zeros (0000).
- You may see **** on screen.
- Some devices also ask to confirm connection after pairing.
- The headphone's LED will stop flashing red/blue once successfully paired/connected.
- You can now make a call using your device’s keypad or voice-dialing feature.
