i tried 2 of the csr based modules the bc05b and bt57f687 they all work as expected. when you first press the power key module should boot and you will probably see the red led active. in bc05b it activates the bluetooth discovery mode automaticly so you can discover the device as BLK-SPK or something like that. in 57f68 you need to get the device in discovery mode by holding power again. For the both modules when you see the blue led blinking rapidly that is discovery mode. When a connection is established the led will be blinking slower. Now im looking futher to find a way to get the caller id from the module if anyone can help.