You need to pair devices when powering up CK3x00 for the first time. Subsequently, all connections between your phone and CK3x00 are automatically established when both devices are within a few meters range of each other.
Procedure (pairing with CK3100 and CK3300)
From your phone, select MENU, SETTINGS then CONNECTIVITY.
Select BLUETOOTH and turn it ON.
Select SEARCH FOR AUDIO ENHANCEMENTS (waiting...).
Select ''CK3x00'' and enter 1234 as Bluetooth PIN code.
Your phone is now paired with the CK3x00.
Automatic connection after pairing:
You can allow the CK3x00 to esthablish the connection automatically (recommended).
From your phone, select MENU, SETTINGS then CONNECTIVITY.
Select PAIRED DEVICES, select ''CK3x00'' and OPTIONS.
Select REQUEST CONN. AUTHORISATION, select NO.
Pairing using the CK3500 (with SIM Access Profile):
You have to activate the Bluetooth connectivity on your phone.