You need to pair devices when powering up 3200LS for the first time. Subsequently, all connections between your phone and 3200LS are automatically established when both devices are within a few meters range of each other.
Procedure
From your phone, press MENU, select CONNECTIVITY, press BLUETOOTH.
Select SEARCH FOR AUDIO ENHANCEMENTS, press SELECT (searching...).
Select "3200LS", press code displayed on 3200LS' screen (connecting).