I think the crux of the article is this: they used the protected monopoly on one market (e.g. CDMA modems) to gain an unfair advantage in the other markets (all the other chips in a cell phone).

> Qualcomm's patent licensing fees were calculated based on the value of the entire phone, not just the value of chips that embodied Qualcomm's patented technology. This effectively meant that Qualcomm got a cut of every component of a smartphone—most of which had nothing to do with Qualcomm's cellular patents.