I loaded the usbserial module, by finding with USBview programme the right numbers for vendor and product.
Then I started minicom, but anyway how hard I tried changing any comm parameters (parity etc.) Nokia didn't respond. (on AT)
However one breakthrough though. I saw that when I reconnected Nokia cable to my mobile, in minicom terminal one dot was emerging.
So when I reconnect the Nokia cable, Minicom in its terminal outputs a dot. And then I started experimenting again with comm parameters and somehow when I reconnected again the cable it was not anymore dot but sign ">".
I don't know really what this dots and signs mean when I reconnect my phone cable. But anyway it means that the minicom is making something out of it.
So what about these dots anyway?