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A worker climbs on a cellular communication tower in Oakland, California.

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A cellular outage early on Thursday hit thousands of AT&T users in the United States, disrupting calls and text messages as well as emergency services in major cities including San Francisco.

About 58,000 incidents were reported around noon ET, according to data from outage-tracking website Downdetector.com. AT&T has not said exactly how many customers were affected by Thursday’s outage and the cause was not immediately clear.

“Some of our customers are experiencing wireless service interruptions this morning,” AT&T said Thursday on a site it put up for updates to the situation. “Our network teams took immediate action and so far three-quarters of our network has been restored. We are working as quickly as possible to restore service to remaining customers.”

Phones affected by the outage have displayed zero service bars in the top right corner of their device or the letters SOS. Customers were still able to make calls by enabling Wi-Fi calling.

A spike in outages began around 4:00 a.m. ET and peaked at around 74,000 reported incidents at 8:30 a.m. ET, according to Downdetector.

Shares of AT&T were down about 2% Thursday morning following the outages.

The AT&T outage has impacted people’s ability to reach emergency services by dialing 911, a post on social media platform X from the San Francisco Fire Department said.

“We are aware of an issue impacting AT&T wireless customers from making and receiving any phone calls (including to 911),” the fire department said on the platform.

Atlanta Mayor Andre Dickens said in a post on X that the city can receive and make outbound 911 calls but that AT&T customers in the area had reported issues.

“We have received calls from AT&T customers that their cellular phones are in SOS mode. Please direct all inquiries to restore service to AT&T,” Dickens said.

The Massachusetts State Police said that people were flooding their 911 center with calls trying to determine if the service works from their cell phones.

“Please do not do this. If you can successfully place a non-emergency call to another number via your cell service then your 911 service will also work,” the state police said in a post on X.

Users of Verizon and T-Mobile were reporting a few thousand outages each as of 10:00 a.m. ET, according to Downdetector.

These reports were likely due to calls made trying to connect with other networks, both companies said.

“Downdetector is likely reflecting challenges our customers were having attempting to connect to users on other networks,” T-Mobile said in an emailed statement.

– Reuters and CNBC’s Steven Kopack contributed to this report.

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How Broadcom’s big OpenAI deal fits into the data center boom and what it means for the AI trade

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How Broadcom's big OpenAI deal fits into the data center boom and what it means for the AI trade

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Oracle CEO Magouyrk: ‘Of course’ OpenAI can pay $60 billion per year

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Oracle CEO Magouyrk: 'Of course' OpenAI can pay  billion per year

Oracle CEO, Clay Magouyrk, sits down with CNBC’s David Faber on Oct. 13, 2025.

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Oracle CEO Clay Magouyrk, one of the two people tapped last month to lead the software company, is confident that OpenAI will be able to cover the costs of the massive amount of cloud infrastructure services it consumes.

In an interview with CNBC’s David Faber at Oracle’s AI World conference on Monday, Magouyrk said “of course” OpenAI can pay $60 billion for a year’s worth of cloud resources. In July, OpenAI agreed to a five-year deal with Oracle that’s worth over $300 billion.

“Just look at the rate at which they’ve grown to, you know, almost a billion users. That’s just unheard of,” said Magouyrk, who sat alongside fellow Oracle CEO Mike Sicilia for the interview in Las Vegas.

OpenAI said last week that its flagship ChatGPT chatbot, which was publicly launched less than three years ago, now has 800 million weekly active users. In 2024, OpenAI recorded a $5 billion net loss.

Sicilia said Oracle has started integrating OpenAI artificial intelligence models into a patient portal for viewing electronic health records. Oracle acquired EHR vendor Cerner for about $28 billion in 2022.

“I’ve seen the results, and I really do think that they’re going to have a dramatic impact on industries, on enterprises of all types,” Sicilia said of OpenAI.

OpenAI rents out Nvidia graphics chips to run models through Oracle, as well as CoreWeave, Google and Microsoft. At the same time, the company is designing a custom AI processor that Broadcom will build. Earlier on Monday, Broadcom and OpenAI said they will jointly deploy 10 gigawatts worth of the new OpenAI chips.

Building out that much infrastructure requires a hefty amount of new energy.

“I think it’s a factor of time, not a factor of if we’ll have enough power,” Sicilia said.

Oracle shares rose almost 6% on Monday. The stock has gained 86% this year, lifting Oracle’s market cap close to $900 billion.

WATCH: Oracle CEO Magouyrk: ‘Of course’ OpenAI can pay $60 billion per year

Oracle CEO Magouyrk: ‘Of course’ OpenAI can pay $60 billion per year

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Quantum stocks surge after JPMorgan investing push into strategic tech

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Quantum stocks surge after JPMorgan investing push into strategic tech

Quantum computing background concept.

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The rally in quantum computing names continued on Monday after JPMorgan Chase announced it as one of the areas it would invest in as part of a new initiative.

The bank said in a release that it would invest up to $10 billion in companies across four areas: supply chain and advanced manufacturing, defense and aerospace, energy technology, and frontier and strategic technologies — which includes quantum computing.

Arqit Quantum, D-Wave Quantum and Rigetti Computing each rose about 20%, while IONQ gained 15% following the announcement. Quantum Computing stock climbed 10%.

“It has become painfully clear that the United States has allowed itself to become too reliant on unreliable sources of critical minerals, products and manufacturing – all of which are essential for our national security,” said CEO Jamie Dimon in a statement.

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The initiative is part of a larger $1.5 trillion, decade-long plan, dubbed the “Security and Resiliency Initiative,” to finance and invest in industries JP Morgan deems critical to U.S. national and economic security.

As one of the 27 specified sub-areas the bank will be focusing on, quantum computing has seen gains as much as triple digits over the past month. Rigetti and D-Wave were up 175% and 130%, respectively.

Tech companies like Google, Microsoft, and Amazon have shown significant interest in gate-model quantum computing, which can potentially solve problems too complex for standard computers.

Rigetti and IONQ quantum computers are accessible through Amazon Braket, a quantum computing service managed by Amazon Web Services.

In February, Microsoft unveiled its first quantum computing chip called Majorana 1, and Google announced its new breakthrough quantum chip named Willow late last year.

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