On 16/12/2012 10:16, tony sayer wrote:

If so then very unlikely thats a anything to do with SIM cards, it
prolly means something completely different;!.

It might be that the designer thought it looked nice, and it broke up a
bit of the board that had no copper tracks on...


We did some boards where the vias were no bigger than the tracks so a
track that apparently ended actually went through.
It doesn't look like that here though as the other vias are quite big.