IanKelley - 7:10 pm on Apr 9, 2010 (gmt 0)

I don't understand why they have to have a dominant market share for this activity to be deemed anti-trust.

Because without a dominant position in the market you can't effectively stifle competition.

Why aren't they in the wrong if only 20% of the phones have Apple OS on them?

Oh they're wrong all right, but as things stand it's up to their customers to decide whether or not to punish them. There are plenty of alternatives to choose from.