Apple files $1 bn lawsuit against chip supplier Qualcomm for overcharging

Apple Inc filed a $1 billion lawsuit against supplier Qualcomm Inc on Friday, days after the U.S. government accused the chip maker of resorting to anticompetitive tactics to maintain a monopoly over key semiconductors in mobile phones.

Qualcomm is a major supplier to both Apple and Samsung Electronics Co Ltd for "modem" chips that connect phones to wireless networks. The two companies together accounted for 40 percent of Qualcomm's $23.5 billion in revenue in its most recent fiscal year.

In the lawsuit filed in U.S. District Court for the Southern District of California, Apple accused Qualcomm of overcharging for chips