Connect via bluetooth to my hands free kit . Please help

Hi Guys

Hope all is well

I have a hands free kit on my 2008 BMW E90 . I have had it for almost 30months and didnt even think of connecting it my phone.

Okay so it has a mic and a little device on my front centre console
When ever I press that device . It onlys says "Language English" thats all.

I have tried doing this when my phone bluetooth is on , still nothing.
I am expecting the signal network bar to appear on my radio.Nothing !!!!

I also had the bluetooth on and tried pressing the voice button ( person with sound wavw from mouth) on the steering and also the call button , but cant seem to get it right

I tried all that with just the radio on , and also while the car was on

Please can someone point me in the right direction

Thannk you and Regards