Bluetooth System (BT)

I am an Italian new KIA owner, I got a Kia Venga 1.6CRD TX last friday and i have tried to learn about the bluetooth system via user's manual but i havent found any answer to my questions. I hope someone can help me.

First thing i wd like to discover is if the BT is always on, meanning, may i use the handsfree if the car radio is turned off?

Is there any possibility of using my phone contacts by the KIA BT?

If i push the connect button on my wheel i just can call the last call i did, so...how can i make a call?

Actually all that i can do is:

1) searching for a contact on my phone contact list,

2) straight activate the call on my phone,

3) pushing the calling button on the wheel and making a call...

I still think there shd be an easier way somehow to make a simple phonecall .

Thank you for any kind of answer.

Regards