Adapted from information on the Sony website:-
Make sure the headset is fully charged and within 1 m (3 ft) of the phone.
Make sure the headset is turned off.
Press and hold the headset On/Off button for at least five seconds, until you hear a long beep after the first signal. The headset is now in pairing mode.
On the phone scan for a new device, when the question "Add device?" appears on your phone press "yes".
If you need to enter a passcode, the headset passcode is 0000.
It works OK with the Orange San Francisco which was what it was bought for.
It also works fine with the iPhone 3GS which has taken over from the Orange San Francisco for some duties.
To unpair (from http://www.mrandmrsloh.com/?p=542 )
"Inside manual: (To reset headset or To unpair headset with a phone)
1. Press and hold down the on/off key until the display shows the flashing
pairing icon.
2. Simultaneously press and hold down the on/off key and the action key until
the headset turns off.
For step 1, you have to turn off your device off first. Once you have turned off the device, then only you can press and hold down the on/off key (about 3-5 seconds) before the display shows a flashing pairing icon (like a recycle logo).
For step 2, press and hold down the on/off key (the button with the play sign) and you press the on/off at the same time to turn it off."
Make sure the headset is fully charged and within 1 m (3 ft) of the phone.
Make sure the headset is turned off.
Press and hold the headset On/Off button for at least five seconds, until you hear a long beep after the first signal. The headset is now in pairing mode.
On the phone scan for a new device, when the question "Add device?" appears on your phone press "yes".
If you need to enter a passcode, the headset passcode is 0000.
It works OK with the Orange San Francisco which was what it was bought for.
It also works fine with the iPhone 3GS which has taken over from the Orange San Francisco for some duties.
To unpair (from http://www.mrandmrsloh.com/?p=542 )
"Inside manual: (To reset headset or To unpair headset with a phone)
1. Press and hold down the on/off key until the display shows the flashing
pairing icon.
2. Simultaneously press and hold down the on/off key and the action key until
the headset turns off.
For step 1, you have to turn off your device off first. Once you have turned off the device, then only you can press and hold down the on/off key (about 3-5 seconds) before the display shows a flashing pairing icon (like a recycle logo).
For step 2, press and hold down the on/off key (the button with the play sign) and you press the on/off at the same time to turn it off."