Jabra hfs004 can not pair to phone.

Delete Jabra from Phone and reboot. Tell phone to search for Bluetooth devices. PRESS THE BLUTOOTH BUTTON ON JABRA! Now you are Paired. Make sure phone is not on Mute.

Jabra Tour - Support

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forget the headset
turn bluetooth off
turn the headset device off
reboot phone.
try again

most pairing when asked by the device requires a 00000 passcode
but you need to set the jabra and the iphone up for pairing
here is a link for jabra the iphone should see it when the jabra is set to set up mode..
http://www.jabra.com/support/Jabra-JOURNEY_100-47300000-15

What kind of phone do you have? I have heard people with LG phones say that it does not pair with their phone. If this is not an issue with you then these steps may be more helpful:
1. Charge your Jabra BT135 until the solid blue LED turns off
(approximately 2 hours)
2. Make sure the Jabra BT135 is switched off
3. To put the Jabra BT135 in pairing mode, press and hold the multifunction
button until the LED stops flashing and turns solid blue
4. Set your mobile phone to "discover" the Jabra BT135 (see your phone
user guide)
5. Press Yes or OK when asked if you want to pair the phone with the
Jabra BT135
6. Enter passkey or PIN = 0000 (4 zeros), then press Yes or OK
7. Your phone will confirm when pairing is complete and your headset
will flash

Depending on the phone, Some phones need to be set to be visible so that Jabra can find it when it is ready to pair.
I would delete the paired entries on the phone and do a fresh pair to the phone.
Do let me know if you are able to do this or can chat and walk you thru.

Assuming you're talking about the Jabra BT2050 headset press and hold the center (round) button for at least 10 seconds; light will stay solid entering the pairing mode. Follow instructions on your phone.

taken from the manual found at

http://www.jabra.com/sites/Jabra/GNimages/Products/WirelessHeadset/BT125%20Black/Documents/User%20manual/BT125_UM_NA_EN_471.pdf

1. Put the headset in pairing mode
• Make sure the headset is off .
• Press and hold the answer/end button until a solid blue light comes on.

2. Set your Bluetooth phone to ‘discover’ the Jabra BT125
Follow your phone’s instruction guide. This usually involves going to a ‘setup,’ ‘connect’ or ‘Bluetooth’ menu on your phone and selecting the option to ‘discover’ or ‘add’ a Bluetooth device.* (See example from a typical mobile phone in fig. 3).

3. Your phone will find the Jabra BT125
Your phone then asks if you want to pair with it. Accept by pressing ‘Yes’ or ‘OK’ on the phone and confirm with the passkey or PIN = 0000 (4 zeros). Your phone will confirm when pairing is complete. In case of unsuccessful pairing, repeat steps 1 to 3.

To make this complete: You need to turn off the headset (hold call button several seconds until it makes descending tone). Then hold button to turn on and keep holding 8 seconds more until blue light is on solid. Then initiate pairing at phone, and enter 0000 as the code.

http://www.jabra.com/sites/Jabra/GNimages/Products/WirelessHeadset/BT150/Documents/User%20manual/BT150_UM_NA_EN_496.pdf
Link for the manual

Page 4 for Pair it with your phone

Before you use your Jabra BT130, you need to pair it with your mobile phone.
1. Put the headset in pairing2 mode Make sure that the headset is on. Press the answer/end button and press the volume up (+) button at the same time, until a solid blue light comes on.
2. Set your Bluetooth phone to ‘discover’ the Jabra BT130 Follow your phone’s instruction guide. This usually involves going to a ‘setup,’ ‘connect’ or ‘Bluetooth’ menu on your phone and selecting the option to ‘discover’ or ‘add’ a Bluetooth device.
3. Your phone will find the Jabra BT130 Your phone then asks if you want to pair with it. Accept by pressing ‘Yes’ or ‘OK’ on the phone and confirm with the passkey or PIN3 = 0000 (4 zeros). Your phone will confirm when pairing is complete. In case of unsuccessful pairing, repeat steps 1 to 3.