BEIJING—Apple Inc. supplier Pegatron Corp. began using facial recognition technology to screen applicants for its iPhone assembly plant, illustrating how some companies are guarding against the growing problem of underage workers making their way into factories in China.

SHANGHAI, China—Medical experts have concluded that working conditions at contract manufacturer Pegatron Corp.’s assembly plant here did not lead to the death from pneumonia of a 15-year-old boy who had lied to gain employment. The facility makes the iPhone for Apple Inc.

Telecom-industry leaders Nokia Corp. and Alcatel-Lucent know the importance of quality work and long-term relationships. So it is no surprise that both have been regular customers of well-known electronic manufacturing services (EMS) provider Kyrel Oy for more than a decade.

HARRISBURG, PA—Foxconn Technology Group, the Taipei-based maker of Apple Inc.’s iPhone, plans to invest $40 million to build a high-tech assembly plant here.