As billions of new devices come online, the way they connect is changing. Here’s what you need to know about Wi-Fi 6, Bluetooth 5 and, of course, 5G cellular.

Google has developed artificial intelligence that can detect a condition that causes blindness in diabetic patients, though tests in India demonstrate the challenges of transferring such technology from the lab to the doctor’s office.

The chairman of Huawei pushed back against claims his company conducts espionage for the Chinese government. But the U.S. says that Huawei’s very structure makes the company a potential tool for espionage and thus a security threat.

Several advocacy groups are urging the FTC to seek a breakup of Facebook as the agency weighs possible penalties against the social media company for privacy violations.

Regulators in China continued a crackdown on internet content by closing hundreds of websites and thousands of mobile apps and calling out tech titan Tencent Holdings Ltd.’s news app for spreading “vulgar” information.

Google’s 27-person Threat Analysis Group, staffed in part by former government agents, leverages access to Gmail and other Google products to fend off attempts to intrude into the company’s vast data store.

Amazon Shipping is trying to poach customers from FedEx and UPS by targeting a common complaint: fuel surcharges and extra fees that drive up the cost of home deliveries.

Employers flood the ranking site with 5-star postings requested from enthusiastic staffers, leading to unusual spikes, a WSJ investigation found. This is a conundrum facing many influential raters, including Amazon.com, Yelp and TripAdvisor, who have had to fend off attempts to game reviews.

Dark Mode: It’s good for your eyes, your battery and maybe even your sanity, and it’s hidden in most of your devices and apps. Here’s how to turn it on almost everywhere.

Frustrated and fatigued by social-media challenges, businesses and others looking for an audience turn to an old standby.

Facebook said it had removed pages and accounts linked to what it said were two Russia-based misinformation campaigns, the latest step in the social-media company’s effort to prevent misuse of its service.

The federal pursuit of theft charges adds pressure on Chinese tech giant Huawei by further involving the criminal-justice system in the fight against China’s alleged encroachment on intellectual property.

The hype that has consumed the nascent driverless car industry over the past few years has moved into a new period of cautious optimism.

Netflix reported a jump in paid subscribers in the fourth quarter, exceeding its own expectations for growth by drawing in more customers in international markets even as domestic growth slowed.

“This is a market that requires patience,” Alibaba President J. Michael Evans told the National Retail Federation’s annual trade show in New York on Monday. ”But if you think about where the country is going in the long-term…The future I think looks very good, notwithstanding some troubling headwinds.”

Zoox has named veteran Intel executive Aicha Evans its new CEO, recruiting a seasoned manager to replace its ousted founder as the startup attempts to reinvent the car.

Venture-capital investors are spraying money into fields like virtual reality, driverless cars and even implants in the brain.

Elon Musk’s SpaceX plans to reduce its workforce by 10%, or roughly 600 employees, even as the company seeks to ramp up ambitious projects.

Apple is planning to release three new iPhone models again this fall, including one with a triple rear camera.

Polish authorities detained and charged a local sales director of Huawei, a Chinese national, with conducting high-level espionage on behalf of China, amid widening global scrutiny of the technology giant.

The Chinese telecommunications giant has been unable to send home certain technologies from research-and-development unit Futurewei, after the Commerce Department signaled it wouldn’t renew a Futurewei export license.

Samsung Electronics plans to unveil its 10th anniversary flagship phone lineup and show a fully functional foldable-screen handset at Feb. 20 events in San Francisco and London.

Owning an Apple device used to be the only way to access the company’s services and software. Now that Apple is on the defensive, the walled garden may be holding it back from reaching vital audiences.

Apple has held out its services unit, which includes the App Store, as a bright spot in an outlook dimmed by soft demand for the iPhone. But the services business faces challenges too.

A Wall Street Journal reconstruction of the worst known hack into the nation’s power system reveals attacks on hundreds of small contractors. The hackers then worked their way up the supply chain. Some experts believe two dozen or more utilities ultimately were breached.

Chief Executive Tim Cook received the big boost in compensation for fiscal 2018, when the iPhone maker blew past annual sales and profit goals but faced slowing momentum for its most popular device.

Amazon.com CEO Jeff Bezos and his wife, MacKenzie, are divorcing after 25 years of marriage, during which Mr. Bezos amassed a personal fortune while building the world’s most valuable company.

U.S. telecom companies have started slapping the 5G label on a smorgasbord of technologies, sowing confusion as they lay the infrastructure for full-fledged mobile 5G wireless service.

MicroLED is better looking, more efficient and more versatile than any previous display tech. Now all Samsung, Sony, LG and others have to do is figure out how to manufacture it affordably.

Uber was internally on track to list this year, Dara Khosrowshahi said, having previously said he expected to seek a debut in the second half of 2019 in what would be one of the biggest public offerings planned for the year.

WeWork secured an additional $2 billion from SoftBank Group, a smaller amount than the Japanese company had previously planned to invest in the co-working space provider.

Samsung expects its fourth-quarter operating profit will decline 29%, guidance that fell far below analysts’ estimates and the latest sign of challenges hitting the tech industry.

Advisers on touchy issues include Tony Perkins’ Family Research Council, Grover Norquist’s Americans for Tax Reform and, on the left, the Southern Poverty Law Center. Their involvement behind the scenes, designed to tamp down a furor over social media’s policing of content, has instead kicked up a new range of disputes.

Apple’s iPhone XR, introduced as a cheaper alternative to the XS and the XS Max, isn’t selling as well as the company had hoped.

Amazon surpasses Microsoft as the largest U.S. company with a market cap of $797 billion, signaling the tech industry’s enduring market dominance even after turbulent months in which investors pummeled their shares.