Originally Posted by CristianM2014
I think I have the same problem you have with my Nexus S.
It doesn't completely not recognize my SIM card because I can make calls, but it can't draw my contacts from my SIM card
and it doesn't seem to draw some other information from my SIM card that makes it so that I can't have mobile data.
Flashing to another ROM has fixed this, so for now, I can conclude that it's just Slimkat.