Cell phone handset maker Sony Ericsson will move its North American headquarters from North Carolina to Atlanta and close half-a-dozen sites worldwide as it retrenches against what it expects will be a tighter market and cuts about 1,600 jobs globally.

The joint venture between Sweden’s LM Ericsson and Japan’s Sony Corp. will consolidate product development operations by closing sites in Research Triangle Park; Seattle; Miami; San Diego; Kista, Sweden; and Chennai, India, spokeswoman Stacy Doster said.

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