You need to pair devices when powering up Parrot 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
From your phone, select CONTROL PANEL, and the CONNECTIONS tab.
Select BLUETOOTH, and the SETTINGS tab.
Turn ON Bluetooth.
From the DEVICES tab, click ADD (searching...).
Select CK3x00, enter 1234 as Bluetooth PIN code, and click DONE (connecting).
Note: Sometimes need to turn OFF then ON the Bluetooth.