MOSTAFA
I have a mate in D-land who uses SKY, but he got it from this mob
http://storesatellite.com/skyingermany.php
As far as i can remember it was this mob..... Perhaps it would be possible for your son to bring his gear with him and then buy a card from the above and go from there. He could, of course, ditch the sky and enjoy the delights of German television (and learn the language at the same time)
Regards
SHJ