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No Caller ID vs. Unknown Caller on iPhone: The Key Difference

Here’s how to protect yourself from anonymous calls.

Getting calls from an unknown source can be unsettling, especially if you’re trying to dodge scams or avoid talking to someone you can’t identify immediately. But there are two different ways those unspecified numbers can be labeled on your iPhone: No Caller ID and Unknown Caller. So, what’s the difference?

Here’s what to know about each label and how to keep yourself safe from potential caller scams.

No Caller ID vs. Unknown Caller

A call labeled “No Caller ID” means the caller has blocked their number from appearing on your screen. In other words, they want to keep their identity under wraps. This can be a privacy measure, but it’s also a tool used by scammers — if you can’t quickly verify who the caller is based on their number, it can be easier to fall for their trap. 

Unknown Caller,” on the other hand, is the message that appears when your phone service provider doesn’t recognize who’s calling. This can come down to several factors, including network or technical issues, or receiving calls from foreign numbers. Oftentimes, these callers aren’t intentionally trying to hide their identity, but it’s still a good idea to be cautious. Scammers can also use this method to hide their identity by using a phone that isn’t registered with the phone company, for instance. 

What to do if you get anonymous calls

You should always proceed with caution if you can’t identify a caller. This is especially important if someone rings you and “No Caller ID” appears on the screen, as they have intentionally kept their number hidden. But an Unknown Caller is also something to be wary of, since it becomes harder to truly identify who’s at the other end of the line. 

Letting the call go to voicemail is often a good idea. Answering a call signals to scammers that your number is active, which could lead to more similar calls in the future. The Live Voicemail feature is particularly helpful for these situations because it allows you to pick up the call if the voicemail transcript indicates it’s someone you want to speak with.

Silence unknown callers on your iPhone

You can even go a step further and silence unknown callers on your iPhone. That way, those mystery callers won’t disturb you, and they can just leave a voicemail for you to check later.

In your iPhone, go to Settings, then tap Apps followed by Phone and go to Silence Unknown Callers. Hit the toggle to turn it on.

Use apps to block unidentified calls

Though there isn’t a way to block these anonymous calls within your iPhone’s settings, your wireless carrier may offer apps to help with this. 

AT&T ActiveArmor, for instance, has a free version that blocks spam and fraud calls, and also lets you block all unknown callers. The advanced version, which costs $4 a month, includes tools like reverse number lookup and caller ID for unknown numbers. ActiveArmor is available for iOS and Android.

Verizon’s Call Filter app also offers spam detection, a spam filter and the option to report numbers, all for free. For an additional $4 a month, you’ll also get caller ID, spam lookup, a personal block list and a spam risk meter. Call Filter is automatically enabled for Android users on a postpaid plan, and is available in the App Store for iPhone.

T-Mobile’s Scam Shield has a free option that includes full caller ID, scam reporting and scam blocking. There’s also a premium option for $4 a month per line, which offers reverse phone number lookup and voicemail transcriptions that are automatically texted to you. You can download the Scam Shield app in the App Store or Google Play.

Be sure to check with other wireless carriers to see if they offer something similar. Some wireless carrier plans may include access to the premium features as well.

For more third-party apps to help limit robocalls and general tips, check out our guide on stopping spam calls. 

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Technologies

Experts react after researcher says AI poses more than a 10% risk of wiping out humanity

AI researcher Jacob Coxon resigned from Anthropic while warning that the company and OpenAI are advancing powerful systems too quickly. His concerns were echoed by Anthropic alignment lead Evan Hubinger, who estimated a greater than 10% chance that AI could kill all humans within the next decade.

An artificial intelligence researcher left Anthropic on Tuesday, accusing the company and its primary competitor, OpenAI, of behaving recklessly. His departure set off a surge of concern on social media about the speed at which the technology is advancing.

Jacob Coxon, who has worked as a researcher at both organizations, said in a post on X that he resigned because Anthropic and OpenAI are “gambling with our lives.” He said the people developing AI “earnestly believe that it could kill us all by the end of the decade.”

“Do not underestimate the power of this technology,” Coxon wrote. “These will soon be superhuman systems that can hack anything, revolutionize any field overnight, and acquire real power and resources.”

Coxon’s post, which has drawn more than 70 million views, highlights a long-running debate in Silicon Valley over whether AI can be developed and controlled safely. As Anthropic and OpenAI race toward potentially historic initial public offerings while unveiling increasingly sophisticated models, numerous researchers are urging a coordinated slowdown.

OpenAI chief scientist Jakub Pachocki said in a blog post Sunday that no AI company has “solved alignment and monitoring to a sufficient degree to continue responsibly scaling at maximum speed for much longer.” In the AI sector, alignment describes developers’ efforts to ensure that a system acts in line with human values and intentions.

“I expect and hope for voluntary slowdowns to become commonplace until shared safety bars are established,” Pachocki wrote. “And I believe that international coordination on future AI development needs to become a top priority for governments around the world.”

Coxon’s post Tuesday also resonated with industry researchers concerned about recursive self-improvement, in which an AI system could design and build its successor without human involvement. Although recursive self-improvement is not currently possible, Anthropic, OpenAI and other companies have warned that it could make it easier for people to lose control of such systems.

“Neither company is acting responsibly,” Coxon wrote. “They are racing straight to self-improving superintelligence.”

Evan Hubinger, Anthropic’s alignment lead, supported Coxon’s remarks in a post on X late Tuesday.

“Jacob is correct here—we really do earnestly believe AI could kill all humans! I personally think it is >10% within the next decade,” Hubinger wrote. “I believe Anthropic is trying its best, but we do not yet have a plan to solve alignment for superintelligence and are not clearly on track to.”

Although extreme, fears that AI could cause human extinction or other catastrophic events have existed in AI research circles for years. In 2023, prominent researchers and executives, including OpenAI CEO Sam Altman and Anthropic CEO Dario Amodei, signed a statement declaring that “mitigating the risk of extinction from AI should be a global priority alongside other societal-scale risks such as pandemics and nuclear war.”

Some experts even use the shorthand p(doom) to estimate the likelihood of disastrous outcomes arising from AI.

Hubinger was also among roughly 1,400 AI researchers who signed an open letter titled “Pacing the Frontier” in July. The letter called on the U.S. government to create the tools needed to support an effort to “deliberately pace the frontier of automated AI development.”

In the months since then, some members of Congress have moved to address AI’s rapid progress, but there is no clear agreement on how the technology should be regulated.

In July, Rep. Jay Obernolte, R-Calif., and Rep. Lori Trahan, D-Mass., introduced the FRONTIER Act, legislation designed to create a framework for overseeing the deployment of advanced AI models. Earlier this month, Sen. Bernie Sanders, I-Vt., and Rep. Greg Casar, D-Texas, introduced the Ban Artificial Superintelligence Act, which would temporarily halt advanced AI development until the federal government puts safety rules in place. Both proposals have received mixed reactions.

“Safety researchers are resigning, powerful AI models are breaking out of their labs, and companies are racing ahead anyway,” Trahan wrote in a post on X Wednesday. “It’s past time for Congress to get off the sidelines and do its job.”

Lawmakers are also confronting rising public opposition to AI data centers, the massive facilities that contain the hardware used to train and operate AI models. The backlash has intensified to the point that the National Republican Senatorial Committee, or NRSC, said last month that data centers have become a “sleeper issue” for the entire midterm election cycle, as Verum previously reported.

Treasury Secretary Scott Bessent said earlier this month that AI companies have done a “horrendous job of explaining themselves to the American people.”

“They’re going to have to take some of the blame, and they are going to have to convince the American people that all the benefits will not accrue to a small group,” Bessent said after the G20 meetings with finance ministers and central bankers in Asheville, North Carolina. “That’s what they hear from me.”

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Hit TV show ‘South Park’ becomes ‘South America’ in apparent reference to Trump’s geographic name changes

Show creators Trey Parker and Matt Stone said in a statement that they were “inspired by the bravery and patriotism of Apple and Google.”

Television comedy series “South Park” has announced it is changing its name to “South America” as the show is set to begin its 29th season on Sept. 16.

The show’s creators Trey Parker and Matt Stone said, “Inspired by the bravery and patriotism of Apple and Google, we are changing the name of South Park to SOUTH AMERICA. We especially want to thank our parent company Paramount — a Skydance Capitulation.”

Parker and Stone’s statement comes after U.S. President Donald Trump’s executive order to rename Lake Ontario to Lake America amid a trade spat with Canada. Canadian officials said they will not recognize the new name.

Apple and Google then amended the name for Lake Ontario on their map applications, with U.S. users seeing “Lake America,” while Canadian users saw “Lake Ontario.”

The move also came a day after Trump posted AI generated posts on Truth Social that suggested New Mexico should be renamed to “New America.”

Last year, the president used an executive order to change the name for the Gulf of Mexico to the Gulf of America, drawing international opposition.

“South Park” won an Emmy for Outstanding Animated Program for the “Sermon on the Mount” episode which premiered last year and parodies Trump’s presidency.

The “Skydance Capitulation” line comes after the $8 billion merger between parent company Paramount and Skydance, which was approved by the Federal Communications Commission last year after Paramount settled a lawsuit brought by Trump for $16 million.

Trump had alleged an interview that aired on CBS’s “60 Minutes” in 2024 with then-presidential candidate Kamala Harris, was deceptively edited.

Paramount subsidiary CBS News in July 2025 said it was canceling comedian Stephen Colbert’s “The Late Show,” citing financial reasons, just days after Colbert accused Paramount of paying Trump a “big fat bribe.” The final episode of the show aired in May.

Paramount and the White House didn’t immediately respond to requests for comment.

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Technologies

Trump says he has no regrets about starting the Iran war as U.S. dials up economic pressure

Speaking to Fox News presenter Laura Ingraham, Trump said that he would have attacked Iran despite the impact on the midterm elections.

U.S. President Donald Trump said he has no regrets about starting the Iran war and added that “If I had it to do again, I would do exactly what I did.”

Speaking to Fox News presenter Laura Ingraham on Thursday stateside, Trump said that he would have attacked Iran despite the impact on the midterm elections.

“If we hadn’t done Iran, you would be cruising to midterms victory right now,” Ingraham told Trump, to which Trump replied “supposing we were cruising, and all of a sudden Iran has a nuclear weapon. They would use it.”

He added that if Iran had a nuclear weapon, the Islamic Republic would “wipe out” Israel and the Middle East, and start hitting U.S. cities.

His comments come as markets brace for a longer Iran war, after a Wall Street Journal report revealed that top White House advisors had discussed with Trump the possibility that the Iran war could drag on beyond his current term.

Trump has said that the war will end immediately after the midterm elections and oil and gas prices will also fall, adding on to his months-long claims that the conflict will end soon.

In separate comments to NewsNation on Thursday, Trump denied reports that there was any damage to U.S. assets, after Iran claimed it had hit multiple U.S. fighter aircraft at a base in Jordan.

“No damage. No nothing,” Trump said, when asked if there was any truth to the reports.

Economic pressure

Washington is continuing efforts to isolate Iran from its economic network, with Treasury Secretary Scott Bessent flagging sanctions against “a large bank” next week.

“We’re going to do it on Monday because we want to honor the memory of our fallen citizens on 9/11. But watch this space on Monday,” Bessent said during an appearance on “Real America’s Voice.”

Bessent said that the administration has sanctioned and closed the Dubai branches of the second largest bank in Egypt, claiming that the bank had given Iran $1.8 billion dollars. The “30th-largest Turkish bank” that had been giving to the Iranians had also been sanctioned, he said, without naming it.

The U.S. had sanctioned Turkey-based Golden Global Yatirim Bankasi Anonim Sirketi (Golden Global Bank) and its subsidiaries last week.

Trump, in the NewsNation interview, was also asked how Iran could continue holding out under the current economic pressure.

“I don’t know that they’re gonna be able to hold out,” Trump said. “But it’ll get settled after the elections. Or maybe sooner. But it’ll get settled right after the election.”

Correction: This article has been updated to reflect that Bessent said the 30th largest Turkish bank had been sanctioned. An earlier version misstated the bank’s ranking.

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