Technologies

Is It Really Safe to Buy an Old or Used Phone? Here’s What You Need to Know

It might not be safe to use an older or used phone. Here’s how you can be sure and how to protect yourself.

The best phones you can buy right now all come with top specs, a plethora of features and pro-level camera systems. But these flagship handsets, like the iPhone 16 Pro and Samsung Galaxy S25 Ultra, also demand a lot of cash if you want to slide them into your pocket. It’s no surprise that many of us look toward more affordable options instead of opting for the latest model. You can save a bundle by looking toward used or older devices. After all, older hardware is usually fully capable of handling what you need it to, and it’s more environmentally friendly to keep using phones for longer, rather than sending them to landfill.

But while these old smartphones might be cheaper, they may not be safe to use, especially if you bought a used phone that’s more than a few years old. The problem is that older phones might run outdated versions of Android or iOS, which means they often don’t have critical security updates that can keep you and your data safe.

If you’re concerned about security and privacy — and you should be — here are some things to consider.

Read more: Make Your Phone Last for Years With These Easy Tips

What is a security patch for a phone OS?

Hackers are constantly looking for cracks and holes in your phone’s software to exploit. Whenever hackers discover a new hole, phone-makers usually get it fixed, and that fix is sent out to your phone to make sure that nobody can take advantage of it. That’s a security patch. You’ll likely have received plenty of them over time as cybercriminals are always trying to find new ways to circumvent the security on your phone.

It’s a continual game of cat and mouse, with hackers finding holes and software providers patching them up. And on the cycle goes. Most of the time, you’ll never know about it, but it’s the thing that’s keeping your phone up to date and protected against known threats.

Why do manufacturers stop sending out security patches?

All manufacturers including Samsung, Sony, Google and OnePlus only provide support to a phone for so long. Each new handset that’s released and each new version of Android requires new threat assessment and patching. That’s a lot of work, and it means that finding and patching those holes for every single handset spanning years and years just becomes unfeasible.

As a result, Google and the phone-makers eventually have to cut off support for older handsets. Those handsets then will no longer receive security updates, meaning that when a threat is detected on that phone, it simply won’t be fixed.

So is using an out-of-date phone safe?

As Christoph Hebeisen, director of the security intelligence company Lookout, explained, «We do not consider it safe to run a device that does not receive security patches. Critical security vulnerabilities become public knowledge every few weeks, or months, and once a system is out of support, then users who continue to run it become susceptible to exploitation of known vulnerabilities.»

According to Hebeisen, a vulnerable phone could allow full access to everything that’s on your phone, including your personal and company emails, contact information, your banking details or audio of your phone calls. A hacker could continue to have access to this information for as long as you continue using the compromised handset.

How do I know if my phone is too old?

Finding out if your phone is still supported and receiving security patches often isn’t straightforward. To start, go into Settings and check your software updates. Install the latest version that’s available. Usually it’ll give you some indication of when the phone was last updated. If your phone says it has the latest OS software, but that latest version was installed many months or even years ago, it’s bad news. Your phone is probably no longer supported.

Sadly, manufacturers don’t give you a warning that tells you when they’ve dropped support for a phone, so you either find out through a rude awakening like I mentioned above, or figure it out yourself through some other means.

Previously it was common that phones may only be supported for a few years, but thankfully most companies — including Google and Samsung — have upped their game, offering support for at least seven years on their recent generations of phone. Google’s latest Pixel 9 and 9 Pro will still be safe to use into 2031, while Apple’s iPhone XR, released six years ago, is still compatible with the latest version of iOS. Companies such as Fairphone take that even further, promising at least eight years of support, while even budget phones like the Nothing CMF Phone 2 Pro come with six years of support.

But longer support periods have been something of a recent trend so if you’re buying an older-generation phone on the used market, it’s possible its support period may be shorter, and may even be out of support already.

Finding out if your Android phone is supported will involve some digging. Samsung sent me its list after I contacted its PR team, and it’s available online here, and while it makes it clear which phones are currently supported with updates, it doesn’t say for how long those updates will continue. Google has a page that clearly tells you when your Pixel or Nexus phone will lose security support. (Spoiler alert: All Nexus and Pixel phones up to and including 2021’s Pixel 5A are all out of their official support periods.)

Your best place to start is with the support pages on your phone manufacturer’s website. You might not notice immediately if your phone is out of date. The most obvious sign you’re on old software might be when you look for new apps to download. Many apps will simply be incompatible due to the software and hardware limitations on your phone and you won’t be able to install them.

How can I tell if my phone has been hacked?

Whether you’d ever notice if your phone’s security was compromised is difficult to say. Cybercriminals don’t exactly make it known they’ve accessed your device, so you’ll need to look for signs. Popups that might appear on the phone are a big giveaway, as are any apps that suddenly appear that you didn’t download.

Also watch out for unexplained high data usage, as it could be that malicious apps are using a lot of data in the background. Other indicators can also include unusually high battery usage and sluggish performance, but both of these can also be attributed to using older hardware that degrades over time.

Read more: Best Android VPNs

How can I keep myself safe if I have an old phone?

As Hebeisen says, the best way to keep yourself safe is simply to not use a phone that’s no longer supported. If you’re short on money, can’t afford to upgrade just yet or you’re using an older phone temporarily for whatever reason, there are a couple of things you can do that could help.

First, you should make sure the phone has the latest software installed. If you bought it used, make sure to fully factory-reset the phone. Ensure that you only download apps from the Google Play Store (rather than from third-party or unofficial app stores) and certainly avoid installing apps by downloading the APK file from a website. This can often be a way that malicious software weasels its way into a phone.

You can help protect your personal information by simply not giving too much away in the first place. Don’t do any banking on the phone, don’t sync your company email accounts and don’t send sexy pictures or have sexy video chats until you’re back on a protected device. (Even over a phone, it’s important to practice safe sex.)

According to Hebeisen, if you don’t take such precautions, «this might enable an attacker to observe and manipulate almost everything happening on the device.» That’s a cold shower, right there.

Technologies

Today’s NYT Strands Hints, Answers and Help for Aug. 25 #540

Here are hints and answers for the NYT Strands puzzle for Aug. 25, No. 540.

Looking for the most recent Strands answer? Click here for our daily Strands hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections and Connections: Sports Edition puzzles.

Some students have been back to school for weeks, but others see that first day looming large. Today’s NYT Strands puzzle has a timely related theme. If you need hints and answers, read on.

I go into depth about the rules for Strands in this story.

If you’re looking for today’s Wordle, Connections and Mini Crossword answers, you can visit CNET’s NYT puzzle hints page.

Read more: NYT Connections Turns 1: These Are the 5 Toughest Puzzles So Far

Hint for today’s Strands puzzle

Today’s Strands theme is: Back to school.

If that doesn’t help you, here’s a clue: Stock your locker.

Clue words to unlock in-game hints

Your goal is to find hidden words that fit the puzzle’s theme. If you’re stuck, find any words you can. Every time you find three words of four letters or more, Strands will reveal one of the theme words. These are the words I used to get those hints but any words of four or more letters that you find will work:

PACK, PACT, TOLL, LAPS, SLAP, SLAT, LOST, BOOK, BOOKS, CRAP

Answers for today’s Strands puzzle

These are the answers that tie into the theme. The goal of the puzzle is to find them all, including the spangram, a theme word that reaches from one side of the puzzle to the other. When you have all of them (I originally thought there were always eight but learned that the number can vary), every letter on the board will be used. Here are the nonspangram answers:

LAPTOP, FOLDERS, BACKPACK, NOTEBOOKS, CALCULATOR

Today’s Strands spangram

Today’s Strands spangram is SUPPLIES. To find it, look for the S that is five letters down on the far-right row, and wind backwards.

Technologies

Back-to-School Deal: Tello’s Unlimited Plan Gets You Cell Service for $15 Per Month Your First 3 Months

Tello’s back-to-school deal lets you save big on cellphone service, but you have until Monday to take advantage of this discount.

The cost of every day basics continues to go up, but we take great pride in looking for ways to help you cut your expenses wherever you can. If you haven’t considered switching phone plans, maybe it’s time to do just that. Phone plans are a necessary line item on everyone’s budget, but switching to a cheaper one can help you save money every monty — which adds up over time.

If you’re looking to make a change, Tello is offering Unlimited phone plans for just $15 per month for your first three months this back-to-school season. You pay this as a $45 upfront payment rather than month to month, which may be preferable for some customers. After your initial three-month period on the Tello plan, the price reverts to the usual cost of $25 per month. But this deal is available only to new Tello customers until Monday.

Tello offers 5G and 4G LTE nationwide coverage so you can reliably get through phone calls or surf the internet. The plan includes unlimited data, 35GB of high-speed data, and free Wi-Fi and hotspot calling. US plans include free calls and texts to more than 60 countries, including Canada, India and Mexico. Data speeds slow down after you use your 35GB. Tello allows you to bring your own phone or lets you get a new one for a separate fee.

Hey, did you know? CNET Deals texts are free, easy and save you money.

If you’re looking for an even more budget-friendly plan, you can also consider their 2GB plans for $10 per month. Right now their 5GB plan is $10 for the first month and then just $14 per month. These have data limits, but they include unlimited talk and text. Once you select your plan, it will renew every 30 days unless you cancel or change it.

Looking for more ways to save on your phone plan but not sure if this deal is for you? Check out our list of the best cheap phone plans or best family plans so you can find exactly the plan you need.

MOBILE DEALS OF THE WEEK

Samsung Galaxy S25 Plus 512GB Unlocked AI Phone (Silver Shadow):

$920 (save $280)
Samsung Galaxy A36 5G 128GB Unlocked Phone (Awesome Black):

$350 (save $50)
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$525 (save $125)
Moto G Stylus 5G 256GB Unlocked Phone(2024 Model, Caramel Latte):

$300 (save $100)
Apple iPhone 14 128GB Unlocked Phone (Refurbished, Midnight):

$334 (save $295)

Deals are selected by the CNET Group commerce team, and may be unrelated to this article.

Why this deal matters

At just $15 per month for three months (and $25 after this period), Tello’s Unlimited plan is one of the most budget-friendly deals available in the market right now and can save you hundreds over the year. This deal is available until Monday, and now is an excellent time to take advantage of it.

Technologies

Pixel Watch 4 Features vs. Apple Watch Series 10: Google Came to Play!

Google’s latest watch takes a direct hit at Apple with a new AI health coach and advanced emergency connectivity. Find out how they stack up.

Google’s Pixel Watch 4 is the newest player on the smartwatch field and it’s not holding back. With a sleek design, AI-powered health coach, first-of-its-kind emergency satellite connectivity and improved battery life, it’s a major leap forward for a relative newcomer that’s been edging its way up the ranks to compete with the heavy hitters of the wearable world.

The Apple Watch Series 10, meanwhile, remains a benchmark in the category. While technically at a disadvantage being last year’s model, it holds its own with more than a decade of refinements and deep integration with the iPhone and Apple’s extensive health and fitness ecosystem.

As smartwatches make the leap from wearable phone extensions to essential health and safety tools, these two flagships are redefining the category — especially with both companies controlling the full hardware and software experience on their respective platforms. And with Apple expected to debut its Series 11 in September, this face-off feels like just the opening move in what’s shaping up to be a high-stakes game of chess between two of the biggest names in tech. Here’s how the specs stack up on paper; we’ll conduct our full suite of tests for the full Pixel Watch 4 review.

Pricing and availability

Being an older model, the Apple Watch Series 10 can be found for a discounted rate through third party sellers like Best Buy and Walmart, but the original price of $399 is technically higher than the base price of the $350 Pixel Watch 4. However, the larger-size versions have less of a price gap with the 45mm Wi-Fi version of the Series 10 costing $429 and the Pixel Watch 4 equivalent costing $400. And the Apple Watch is the only one that offers a higher-end titanium model that costs about $200 more than the base aluminum. Both watches are rated for 5ATM water resistance and have IP6X dust protection.

Design and display

Both watches remain true to their original form factor and this category is more a matter of preference. The Pixel Watch 4 sticks with its signature circular design that looks closer to a traditional analog watch than the Apple Watch, with a bubble-like screen that curves outward for a sleek, all-display look. It comes in 41mm and 45mm sizes with silver, dark gray and gold aluminum finishes, plus interchangeable bands.

Apple, by contrast, hasn’t strayed from its signature rectangular shape since its launch. It’s more «tech» looking than the Pixel Watch, but it’s also slightly more practical for navigating apps and notifications. The Series 10 also has minimal bezels with a screen that expands into the thin frame and comes in a 42mm and 46mm version. The Apple Watch has a slightly higher pixel density for better image quality but the Pixel 4 is brighter with up to 3,000 nits peak brightness compared to the Apple Watch’s 2,000 nits.

Performance, software and AI

Under the hood, both watches run the latest versions of their respective software: WatchOS 10 for Apple and Wear OS 6 for the Pixel. Apple offers the usual tight integration with the iPhone, while Google leans on its Fitbit acquisition for health tracking and now its AI expertise with the built-in Gemini assistant.

And this is where the Apple Watch starts to lose its footing. Google’s Gemini voice assistant handles back-to-back commands, summarizes information from your apps and responds conversationally without shuttling you out to a web link — something Siri still struggles to match. Apple’s assistant remains more limited, often requiring repeat commands and leaning on your iPhone for anything beyond the basics. Even a cautious AI user like myself can’t help notice how Gemini’s added capabilities feel genuinely useful on the wrist, cutting down on screen taps and making it easier to get more done on the go.

Health and fitness features

This is another area where Google’s AI could give the Pixel Watch 4 an extra edge. Both watches set the standard in health and fitness features — Apple because of its longstanding commitment to health and fitness, and Pixel through its integration with Fitbit. Their metrics are accurate and easy to make sense of in their respective apps. But the Pixel 4 just stepped it up with a concierge style AI health coach (coming in October) that can help you interpret your health data and give personalized recommendations: everything from whether to rest or exercise on any given day, to how to improve sleep quality. Apple’s Workout Buddy, coming in watchOS 26, offers live feedback on a handful of workouts but isn’t as far along in pulling together a complete picture of your health data (at least not yet). The caveat, however, is that Google’s coach will require a Fitbit Premium subscription ($10/month after a trial), while Apple’s AI fitness tool is free.

Emergency features

Beyond health tracking, both watches add an extra layer of protection with a range of emergency tools, including fall and crash detection, workout check-ins and Emergency SOS. The Apple Watch leans more on proactive health alerts, like warnings for irregular heart rhythm and potential sleep apnea.

But the Pixel Watch 4 just boosted its emergency features by adding satellite connectivity. This means you can send a message for help even without a phone or cell service. The Apple Watch, by comparison, still relies on the iPhone or needs network coverage for models that are cellular-enabled to make an emergency call.

Battery and charging

On paper the Series 10 promises 18 hours of heavy use, though in our testing it’s consistently gotten closer to 26 to 30 hours with the always-on display active. Google claims 30 to 40 hours on the Pixel Watch 4 depending on size, giving it a slight edge, but it’s hard to pass judgment without our real world tests.

Charging speed is another strong point for both watches with quick charge capabilities, although the Pixel Watch 4 is still faster when you need a quick top-up. It reaches 50% in just 15 minutes and a full charge in an hour. The Series 10 also takes an hour to reach a full charge, but hits 80% in 40 minutes.

Google has also made the Pixel Watch 4’s battery and display easier to replace for repairs, a big step forward for long-term usability, while Apple hasn’t emphasized the same level of repairability on the Series 10.

Bottom line

If you’re all-in on Apple, the Series 10 still delivers everything you need in a smartwatch. But for Android users (or anyone curious about AI on the wrist) the Pixel Watch 4 shows Google is serious about challenging Apple’s dominance.

Pixel Watch 4 vs. Apple Watch Series 10: Specs at a glance

	Pixel Watch 4	Apple Watch Series 10
Design & sizes	Round, 41mm & 45mm	Square, 42mm, 46mm
Display	AMOLED LTPO, 320 ppi	LTPO3 OLED, 446 x 374 ppi
Thickness & weight	12.3mm; 31–36.7g	9.7mm; 30-41.7g (46mm titanium model)
Material & finish	Aluminum case: Silver, Champagne gold, Satin Moonstone or Matte black finish	Aluminum: Jet black, Rose gold or Silver finish; Titanium: Slate, Gold or Natural finish
Durability	5ATM water + IP68 (dust)	5ATM Water + IP6X (dust)
Battery life	30–40 hrs (always-on) + quick charge dock: 50% in 15min, 100% in 60 min	24-30 (always-on) + Fast charge: 80% in 30 min, 100% in 60 min
Sensors	ECG, SpO₂, heart rate, skin temp, loss of pulse detection	ECG, heart rate, skin temp, depth gauge, SpO2, Noise monitoring
Emergency features	Satellite SOS, Safety Check, Safety Signal, fall & crash detection	Emergency SOS, Fall detection, Crash detection, Check in and Backtrack
AI & coaching	Gemini voice assistant; Fitbit AI health coach (via Premium)	Siri (voice assistant); Workout Buddy
Processor	Qualcomm Snapdragon W5 Gen 2, Cortex-M55 co-processor	S10 SiP with 64-bit dual-core processor, W3 Apple wireless chip
RAM/Storage	2GB, 32GB (storage)	64GB (storage)
Payments	Google Wallet	Apple Pay
Price (US)	$350–$500	$399-$750 (titanium)