News bites: Apple-Samsung battle set for trial

Apple's $2.5 billion patent infringement case against Samsung begins Monday in California, Bloomberg reports.

Apple has discussed making a major investment in Twitter, according to The New York Times.

A South Korean wireless carrier apologized after the personal data of 8.7 million subscribers was hacked, Reuters says.

New Yahoo CEO Marissa Mayer is incorporating some of Google's practices, such as free food for employees, AllThingsD reports.