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Here's your TNB Tech Minute for Thursday, November 7th. I'm Cordelia James for the Wall Street Journal.

We're exclusively reporting that a federal agency is directing employees

to reduce the use of their phones for work matters

due to China's recent hack of U.S. telecommunications infrastructure.

That's according to people familiar with the matter.

The chief information officer at the Consumer Financial Protection Bureau warned in an email

sent to staff that internal and external work-related meetings and conversations that

involve non-public data should only be held on platforms like Microsoft Teams and Cisco WebEx.

The CIO said that while there wasn't evidence of the federal agency being targeted,

compliance is needed to reduce the risk of being compromised. The cybersecurity and infrastructure

security agency didn't respond to a request for comment. Electric Vehicle Startup Rivian

says a part shortage in the third quarter hampered factory production, but that it's

still on track to report its first ever gross profit by the year's end.

Rivian said in a letter to shareholders that it was working with a supplier to resolve the shortage

and added that higher selling prices and lower manufacturing costs helped to offset a slowdown

in vehicle deliveries. The startup has long promised

that it could achieve a gross profit in the fourth quarter of this year, despite previously losing

tens of thousands of dollars on every vehicle it sold. Rivian reported revenue declined to

$874 million, missing Wall Street's expectations. The company burned through $1.2 billion of its cash reserves

during the quarter, double the fact-set estimate. And Chicago-based U.S. cellular has agreed to

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