Phone RTE-3HD from Nokia

Good morning, please don’t kill me if this topic already exists but since yesterday my search doesn’t make sense and I can’t find an answer to my question. And that is, I drive a Phaeton Built 04, 3.2 V6 and have a telephone preparation with a connection in the center console. Everything is good, phone is in it and SIM card I used yesterday as well. Does everything work Prima, super Net(D2), aaaaaaaaber, it is not possible except to keep the listener in the ear to phone n? I mean, if someone calls me then the phone rings out of the speakers and I can go over the steering wheel, where is the point when I can go over the steering wheel, numbers can call but then the phone has to hold to the ear?????????? So to my question, is it not a hands-free device? Isn’t there the possibility without the phone to call so that everything runs over the boxes or am I just too stupid, because it irritates me that I over the m can choose the steering wheel, can go to it and can also hang it up but then it comes directly from the receiver?