NO Bluetooth, but I got a Call??!!

[euro96]

Hey guys,

the other day my wife and I are driving down the road, and all of the sudden a phone rings through the speakers. we press the phone button, and hear a person on the line, they spoke spanish but they did manage to say wrong number after a while....

now the weird part is that our X5 4.4 is a 2004, but the early 2004, with a 12/03 build date......I was under the impression that my car has no Bluetooth....so how did we get the call, and why were we able to talk to them?

(our phones didn not register any call, so it was entirely through the car..)

can you guys help me out??