https://www.cnbc.com/2019/04/17/apple-vs-qualcomm-why-apple-objected-so-strongly.html

Qualcomm and Apple have settled a bitter legal battle over billions of dollars in royalties and licensing fees just as it went to trial this week in San Diego, California. As part of the settlement, all legal action worldwide between the two companies will be dropped, and Apple will buy Qualcomm chips again.

The dispute centered around modem chips, which allow the iPhone and other computers to connect to cellular networks. Apple buys modem chips from companies like Qualcomm and Intel.