Martyn WilliamsSenior U.S. Correspondent, IDG News Service Follow me on Google+

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

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Apple Pay tops Tim Cook's to-do list in China

Apple CEO wrapped up a four-day trip to China on Friday

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Rite Aid stores block Apple Pay, Google Wallet payments

Payments were accepted at Apple Pay's launch on Monday, but appear to have been blocked by the retailer.

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Some Bank of America customers double-charged with Apple Pay

The bank said the minor glitch should be resolved by the end of Wednesday

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Why Apple Pay could even be a big deal for Android users

A success for Apple Pay could push others in the mobile NFC payment market to up their game

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Tim Cook visits Palo Alto Apple Store line to launch iPhone 6 sales

Apple's CEO met customers and posed for selfies.

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The kill switch is here: iOS 8 enables it by default

Apple is the first smartphone maker to abide by a new California anti-theft law by inserting a "kill switch" into iOS 8, which powers the iPhone 6.

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Subway to accept NFC payments starting in October

The sandwich chain will roll out contactless payments at 26,000 restaurants

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Want lithium-ion batteries to last? Slow charging may not be the answer

For the first time, scientists have examined how a battery operates on the particle level

on pcworld.com

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California passes law mandating smartphone kill switch

The law is likely to affect smartphones sold around the world

on pcworld.com

Phone unlocking bill clears US House, next step is president's signature

The bill reverses a 2013 decision that phone unlocking by consumers ran afoul of copyright laws.

on pcworld.com

Bose sues Beats over headphone patents

Headphone maker Bose has launched a patent-infringement lawsuit against rival Beats Electronics, which Apple recently agreed to acquire in a $3 billion dollar deal.

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Five takeaways from the Apple earnings call

Apple's doing great in China, not so well in tablets, and R&D spending is increasing

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Apple gets patent for 3-year-old smartwatch design labeled 'iTime'

The patent is for a wrist-worn gadget that has a touchscreen and can communicate with a smartphone

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Why the Apple-IBM deal matters

Times have changed since Apple's '1984' commercial bashing IBM.

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As iPhone thefts drop, Google and Microsoft plan kill switches on smartphones

After a year of pressure, U.S. law enforcement officials announce a major success in their phone anti-theft push

on pcworld.com