BMW Factory Phone... BT enable ?
 

I am lost and would appreciate some help on this one:
I have a factory phone fitted (BMW cordless model) which is working really well when i slide my sim card into the specific slot. However i was wondering if i could use my mobile through BT to bypass this unit? I have the shouting man and R/T buttons on the steering wheel but can't see any specific button on the bmw phone case (for triggering the pairing mode), also when i switched on the BT on my mobile i can see the car BT network (which must confirm BT is enable in this car) and once i enter the PK key (4 digits) on the phone it seems to be paired but nothing happen after this, i can't control the phone from the onboard computer / steering wheel
Any ideas?

thanks