Martyn WilliamsSenior U.S. Correspondent, IDG News Service

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Martyn Williams covers mobile telecoms, security, Silicon Valley, and general technology breaking news for the IDG News Service, and is based in San Francisco.

Apple to SIM-lock Japanese iPads

Apple appears to have reversed course in Japan on a key feature of its iPad 3G and won't offer a version capable of being used with any cellular carrier.

Fujitsu improves color e-paper screen

Fujitsu Laboratories will unveil next week a new version of its electronic paper display that's easier on the eyes, the company said Friday.

Sony to end floppy disk production

Sony will end production of floppy disks next year due to dwindling demand, it said Monday.