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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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Google races to put Gemini at the center of Android before Apple’s AI reboot

Google is using its latest Android rollout to position Gemini as the AI layer across phones, Chrome, laptops and cars.

Google is using its latest Android rollout to make Gemini less of a chatbot and more of an operating layer across the phone, browser, car and laptop, just weeks before Apple is expected to show its own Gemini-powered Apple Intelligence reboot at WWDC.
Ahead of its Google I/O developer conference next week, the company previewed a number of Android updates, including AI-powered app automation, a smarter version of Chrome on Android, new tools for creators, a redesigned Android Auto experience, and a sweeping set of new security features.
Alphabet is counting on Gemini to help Google compete directly with OpenAI and Anthropic in the market for artificial intelligence models and services, while also serving as the AI backbone across its expansive portfolio of products, including Android. Meanwhile, Gemini is powering part of Apple’s new AI strategy, giving Google a role in the iPhone maker’s reset even as it races to prove its own version of personal AI on the phone is further along.
Sameer Samat, who oversees Google’s Android ecosystem, told CNBC that Google is rebuilding parts of Android around Gemini Intelligence to help users complete everyday tasks more easily.
“We’re transitioning from an operating system to an intelligence system,” he said.
As part of Tuesday’s announcements. Google said Gemini Intelligence will be able to move across apps, understand what’s on the screen and complete tasks that would normally require a user to jump between multiple services. That means Android is moving beyond the traditional assistant model, where users ask a question and get an answer, and acting more like an agent.
For instance, Google says Gemini can pull relevant information from Gmail, build shopping carts and book reservations. Samat gave the example of asking Gemini to look at the guest list for a barbecue, build a menu, add ingredients to an Instacart list and return for approval before checkout.
A big concern surrounding agentic AI involves software taking action on a user’s behalf without permissions. Samat said Gemini will come back to the user before completing a transaction, adding, “the human is always in the loop.”
Four months after announcing its Gemini deal with Google, Apple is under pressure to show a more capable version of Apple Intelligence, which has been a relative laggard on the market. Apple has long framed privacy, hardware integration and control of the user experience as its advantages.
Google’s Android push is designed to show it can bring AI deeper into the device experience while still giving users control over what Gemini can see, where it can act and when it needs confirmation.
The app automation features will roll out in waves, starting with the latest Samsung Galaxy and Google Pixel phones this summer, before expanding across more Android devices, including watches, cars, glasses and laptops later this year.
The company is also redesigning Android Auto around Gemini, turning the car into another major surface for its assistant. Android Auto is in more than 250 million cars, and Google says the new release includes its biggest maps update in a decade and Gemini-powered help with tasks like ordering dinner while driving.
Alphabet’s AI strategy has been embraced by Wall Street, which has pushed the company’s stock price up more than 140% in the past year, compared to Apple’s roughly 40% gain. Investors now want to see how Gemini can become more central to the products people use every day.
WATCH: Alphabet briefly tops Nvidia after report of $200 billion Anthropic cloud deal

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Waymo recalls 3,800 robotaxis after glitch allowed some vehicles to ‘drive into standing water’

Waymo issued a voluntary recall of about 3,800 of its robotaxis to fix software issues that could allow them to drive into flooded roadways.

Waymo is recalling about 3,800 robotaxis in the U.S. to fix software issues that could allow them to “drive onto a flooded roadway,” according to a letter on the National Highway Traffic Safety Administration’s website.
The voluntary recall is for Waymo vehicles that use the company’s fifth and sixth generation automated driving systems (or ADS), the U.S. auto safety regulator said in the letter posted Tuesday.
Waymo autonomous vehicles in Austin, Texas, were seen on camera driving onto a flooded street and stalling, requiring other drivers to navigate around them. It’s the latest example of a safety-related issue for the Alphabet-owned AV unit that’s rapidly bolstering its fleet of vehicles and entering new U.S. markets.
Waymo has drawn criticism for its vehicles failing to yield to school buses in Austin, and for the performance of its vehicles during widespread power outages in San Francisco in December, when robotaxis halted in traffic, causing gridlock.
The company said in a statement on Tuesday that it’s “identified an area of improvement regarding untraversable flooded lanes specific to higher-speed roadways,” and opted to file a “voluntary software recall” with the NHTSA.
“Waymo provides over half a million trips every week in some of the most challenging driving environments across the U.S., and safety is our primary priority,” the company said.
Waymo added that it’s working on “additional software safeguards” and has put “mitigations” in place, limiting where its robotaxis operate during extreme weather, so that they avoid “areas where flash flooding might occur” in periods of intense rain.
WATCH: Waymo launches new autonomous system in Chinese-made vehicle

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Qualcomm tumbles 13% as semiconductor stocks retreat from historic AI-fueled surge

Semiconductor equities reversed sharply after a broad AI-driven advance, with Qualcomm suffering its worst day since 2020 amid inflation concerns and rising oil prices.

Semiconductor stocks fell sharply on Tuesday, reversing course after an extensive rally that had expanded the artificial intelligence investment theme well past Nvidia and driven the industry to unprecedented levels.

Qualcomm plunged 13% and was on track for its steepest single-day decline since 2020. Intel shed 8%, while On Semiconductor and Skyworks Solutions each lost more than 6%. The iShares Semiconductor ETF, which benchmarks the overall sector, fell 5%.

The sell-off came after a key gauge of consumer prices came in above forecasts, and as conflict in Iran pushed crude oil higher—prompting investors to shift away from riskier assets.

The preceding advance had widened the AI opportunity set beyond longtime industry leader Nvidia, which for much of the past several years had largely carried the market to new peaks on its own.

Explosive appetite for central processing units, along with the graphics processing units that power large language models, has sent chipmakers to all-time highs.

Market participants are wagering that the shift from AI model training to autonomous agents will lift demand for additional AI hardware. Among the beneficiaries are memory chip producers, which are raising prices as supply remains tight.

Micron Technology slid 6%, and Sandisk cratered 8%. Sandisk’s stock has surged more than six times over since January.

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