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Your phone shares data at night: Here’s how to stop it

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Your phone shares data at night: Here’s how to stop it

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If your smartphone stays on your bedside table overnight, it stays busy long after you fall asleep. 

Even while it appears idle, your phone continues to send and receive data in the background. Some of that activity is expected. Your device checks for security patches, syncs system settings and keeps essential services running. Other data transfers are far less obvious and far less necessary.

Experts warn that smartphones routinely transmit tracking and advertising signals without you fully realizing it. In many cases, that data includes information that should only be shared with clear and informed consent.

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Even while you sleep, a nearby smartphone can continue sending and receiving data in the background. (Getty Images/monkeybusinessimages)

What data your phone sends while you sleep

Your phone is not just charging overnight. It operates in a continuous data loop that generally falls into two categories.

Legitimate system data

This includes updates, crash reports and basic diagnostics. Operating systems rely on this information to fix bugs, improve stability and protect against security threats. In most cases, this data collection is disclosed and configurable.

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Tracking and advertising data

This is where concerns grow. Smartphones also transmit location signals, device identifiers, advertising IDs, usage patterns and app behavior data. Companies combine this information to build detailed user profiles and deliver targeted ads that promise higher engagement. The problem is that the line between necessary diagnostics and commercial tracking is often blurry. Many of us never realize how much data flows out of our phones overnight.

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Phones often stay active overnight, syncing apps, checking networks and refreshing data unless you limit background activity. (Kurt “CyberGuy” Knutsson)

What we know about phone tracking today

Independent academic investigations found that some Android devices transmitted data linked to tracking behaviors involving major companies like Meta and Yandex. The research, conducted by teams from IMDEA Networks Institute and European universities, showed that certain apps and services continued communicating with external servers even after users attempted to limit tracking. The researchers observed data flows that could link web activity with app identifiers, raising concerns about how effectively privacy controls were enforced at the system level.

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There is also long-standing concern around smartphones appearing to “listen” to conversations. While no public evidence shows that phones actively record private speech for advertising, many users report ads that closely mirror recent conversations. At a minimum, aggressive data collection combined with location, app usage and search history can make these moments feel unsettling.

Despite years of scrutiny, most smartphones still operate this way today. The good news is that you can reduce how much data leaves your device.

How to protect yourself from overnight data sharing

You do not need to give up your smartphone to regain control. Small settings changes can make a real difference.

1) Review app permissions

Start with your installed apps. Focus on those with access to your location, microphone, camera and tracking data. Only allow sensitive permissions while the app is in use. Be especially cautious with apps that run continuously in the background.

How to review app permissions on iPhone 

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  • Open Settings
  • Tap Privacy & Security
  • Tap Location ServicesMicrophoneCamera or Tracking
  • Select an app from the list
  • Choose While Using the App or Never when available

For tracking controls:

  • Go to Settings
  • Click Privacy & Security
  • Tap Tracking
  • Turn off Allow Apps to Request to Track

This prevents apps from accessing your advertising identifier and sharing activity across apps and websites.

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Turning off app tracking on your iPhone blocks apps from linking your activity across other apps and websites. (Kurt “CyberGuy” Knutsson)

How to review app permissions on Android

Settings may vary depending on your Android phone’s manufacturer.

  • Open Settings
  • Tap Privacy & Security or Security and privacy 
  • Click More privacy settings 
  • Tap Permission Manager
  • Select LocationMicrophoneCamera or Sensors
  • Tap an app and choose Allow only while using the app or Don’t allow

To review background access:

  • Go to Settings
  • Click Apps
  • Select an app
  • Tap Mobile data & Wi-Fi
  • Turn off Background data if the app does not need constant access

This limits silent data transfers when the app is not actively open.

2) Limit background activity

Disabling background activity reduces how often apps sync data when you are not using them. This also limits automatic cloud activity. Keep in mind that this may affect real-time backups or notifications. Weigh the convenience against the privacy trade-off.

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How to limit background activity on iPhone

Turn off Background App Refresh

  • Open Settings
  • Tap General
  • Tap Background App Refresh
  • Tap Background App Refresh at the top
  • Select Off or Wi-Fi

To disable it for specific apps:

  • Stay on the Background App Refresh screen
  • Toggle off apps that do not need to update in the background

This prevents apps from quietly syncing data when they are not open.

How to limit background activity on Android 

Settings may vary depending on your Android phone’s manufacturer.

Restrict background data

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  • Open Settings
  • Tap Apps
  • Select an app
  • Tap Mobile data & Wi-Fi
  • Turn off Background data

Restrict background battery usage

  • From the app’s settings screen, tap Battery
  • Select Restricted or Limit background usage

This reduces background syncing and prevents apps from running silently when you are not actively using them.

3) Turn off personalized advertising

Personalized ads rely on device identifiers and activity data collected across apps. Turning this off limits how your behavior is used for ad targeting, even when your phone is idle.

How to turn off personalized ads on iPhone

  • Open Settings
  • Tap Privacy & Security
  • Tap Tracking
  • Turn off Allow Apps to Request to Track

To limit Apple ads:

  • Go to Settings
  • Click Privacy & Security
  • Tap Apple Advertising
  • Turn off Personalized Ads

This reduces ad targeting based on your activity within Apple services.

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Disabling personalized ads reduces how your behavior is used to target ads, even when your phone is idle. (Kurt “CyberGuy” Knutsson)

How to turn off personalized ads on Android

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Settings may vary depending on your Android phone’s manufacturer.

  • Open Settings
  • Tap Privacy & Security or Security and privacy
  • Click More privacy settings
  • Tap Ads or Advertising
  • Tap Delete advertising ID or Opt out of Ads Personalization
  • Click Delete advertising ID

You can also reset your advertising ID from this menu to break the link between past activity and future ads.

This limits how apps and advertisers track behavior across apps and websites.

4) Consider a VPN

A reputable VPN can help obscure your IP address and reduce certain forms of network-based tracking. It does not stop all data collection, but it adds a layer of protection, especially on shared or public networks.

For the best VPN software, see my expert review of the best VPNs for browsing the web privately on your Windows, Mac, Android and iOS devices at Cyberguy.com.

5) Remove your data from broker sites

Even if you lock down your phone, much of your personal information already exists online. Data brokers collect and sell details like your name, address, phone number and browsing behavior.

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Using a reputable data removal service can help locate and remove your information from these sites. This reduces how easily advertisers and third parties can link your phone activity to your real identity.

For ongoing protection, these services do all the work for you by actively monitoring and systematically erasing your personal information from hundreds of websites. It’s what gives me peace of mind and has proven to be the most effective way to erase your personal data from the internet. By limiting the information available, you reduce the risk of scammers cross-referencing data from breaches with information they might find on the dark web, making it harder for them to target you.

Check out my top picks for data removal services and get a free scan to find out if your personal information is already out on the web by visiting Cyberguy.com.

Get a free scan to find out if your personal information is already out on the web: Cyberguy.com.

6) Use airplane mode or power off at night

If overnight data sharing concerns you, the simplest option is also the most effective. Turning your phone off or using airplane mode cuts off wireless communication while still allowing alarms to work.

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How to turn on airplane mode on iPhone

  • Open Control Center by swiping down from the top right corner
  • Tap the airplane icon so it turns orange
  • Confirm that cellular, Wi Fi and Bluetooth turned off

How to turn on airplane mode on Android

Settings may vary depending on your Android phone’s manufacturer.

  • Swipe down from the top of the screen to open Quick Settings
  • Tap the airplane mode icon
  • Check that mobile data, Wi Fi and Bluetooth are disabled

If you still want Bluetooth for a watch or headphones, you can turn it back on manually after enabling airplane mode. This keeps most background data transfers blocked while you sleep.

Take my quiz: How safe is your online security?

Think your devices and data are truly protected? Take this quick quiz to see where your digital habits stand. From passwords to Wi-Fi settings, you’ll get a personalized breakdown of what you’re doing right and what needs improvement. Take my Quiz here: Cyberguy.com.

Kurt’s key takeaways

Your smartphone works around the clock, even when you do not. Some background data sharing keeps your device secure and functional. Other data collection exists primarily to fuel tracking and advertising. The key is awareness and control. By tightening permissions, limiting background activity and disabling ad personalization, you reduce how much of your personal data leaves your phone while you sleep. Privacy is not about fear. It is about informed choices.

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Do you leave your phone fully on overnight, or will tonight be the night you finally switch it off? Let us know by writing to us at Cyberguy.com.

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Copyright 2026 CyberGuy.com. All rights reserved.  

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Technology

Adobe actually won’t discontinue Animate

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Adobe actually won’t discontinue Animate

Adobe is no longer planning to discontinue Adobe Animate on March 1st. In an FAQ, the company now says that Animate will now be in maintenance mode and that it has “no plans to discontinue or remove access” to the app. Animate will still receive “ongoing security and bug fixes” and will still be available for “both new and existing users,” but it won’t get new features.

An announcement email that went out to Adobe Animate customers about the discontinuation did “not meet our standards and caused a lot of confusion and angst within the community,” according to a Reddit post from Adobe community team member Mike Chambers.

Animate will be available in maintenance mode “indefinitely” to “individual, small business, and enterprise customers,” according to Adobe. Before the change, Adobe said that non-enterprise customers could access Animate and download content until March 1st, 2027, while enterprise customers had until March 1st, 2029.

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Technology

Department of Justice appeals Google search monopoly ruling

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Department of Justice appeals Google search monopoly ruling

On Tuesday, the Department of Justice and the plaintiffs in the antitrust case against Google filed a cross-appeal, as the DOJ Antitrust Division announced in a post on X: “Today, the DOJ Antitrust Division filed notice that it will cross-appeal from the remedies decisions in its case against Google’s unlawful monopolization of internet search and search advertising.”

Just a few weeks ago, Google itself filed a notice to appeal and requested a pause on the remedies ordered by DC District Court Judge Amit Mehta last year. Those remedies included requiring Google to share search data with its rivals and barring Google from making exclusive distribution deals for its search or AI products that could hinder distribution for competitors. However, Google was ultimately not required to sell its Chrome browser and wasn’t barred from paying distribution partners for preloading or premium placement of its search or AI products.

The DOJ’s cross-appeal suggests that neither party is fully satisfied with Judge Mehta’s ruling in the case, or at least the remedies ordered in September.

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149 million passwords exposed in massive credential leak

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149 million passwords exposed in massive credential leak

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It has been a rough start to the year for password security. A massive database containing 149 million stolen logins and passwords was found publicly exposed online. 

The data included credentials tied to an estimated 48 million Gmail accounts, along with millions more from popular services. Cybersecurity researcher Jeremiah Fowler, who discovered the database, confirmed it was not password-protected or encrypted. Anyone who found it could have accessed the data. 

Here is what we know so far and what you should do next.

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A publicly exposed database left millions of usernames and passwords accessible to anyone who found it online. (Wei Leng Tay/Bloomberg via Getty Images)

What was found in the exposed database

The database contained 149,404,754 unique usernames and passwords. It totaled roughly 96 GB of raw credential data. Fowler said the exposed files included email addresses, usernames, passwords and direct login URLs for accounts across many platforms. Some records also showed signs of info-stealing malware, which silently captures credentials from infected devices. 

Importantly, this was not a new breach of Google, Meta or other companies. Instead, the database appears to be a compilation of credentials stolen over time from past breaches and malware infections. That distinction matters, but the risk to users remains real.

Which accounts appeared most often

Based on estimates shared by Fowler, the following services had the highest number of credentials in the exposed database.

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  • 48 million – Gmail
  • 17 million – Facebook
  • 6.5 million – Instagram
  • 4 million – Yahoo Mail
  • 3.4 million – Netflix
  • 1.5 million – Outlook
  • 1.4 million – .edu email accounts
  • 900,000 – iCloud Mail
  • 780,000 – TikTok
  • 420,000 – Binance
  • 100,000 – OnlyFans

Email accounts dominated the dataset, which matters because access to email often unlocks other accounts. A compromised inbox can be used to reset passwords, access private documents, read years of messages and impersonate the account holder. That is why Gmail appearing so frequently in this database raises concerns beyond any single service.

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Email accounts appeared most often in the leaked data, which is especially concerning because inbox access can unlock many other accounts. (Felix Zahn/Photothek via Getty Images)

Why the exposed database creates serious security risks

This exposed database was not abandoned or forgotten. The number of records increased while Fowler was investigating it, which suggests the malware feeding it was still active. There was also no ownership information attached to the database. After multiple attempts, Fowler reported it directly to the hosting provider. It took nearly a month before the database was finally taken offline. During that time, anyone with a browser could have searched it. That reality raises the stakes for everyday users.

This was not a traditional hack or company breach

Hackers did not break into Google or Meta systems. Instead, malware infected individual devices and harvested login details as people typed them or stored them in browsers. This type of malware is often spread through fake software updates, malicious email attachments, compromised browser extensions or deceptive ads. Once a device is infected, simply changing passwords does not solve the problem unless the malware is removed.

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Researchers believe infostealing malware collected the credentials, silently harvesting logins from infected devices over time. (Jaap Arriens/NurPhoto via Getty Images)

How to protect your accounts after a massive password leak

This is the most important part. Take these steps even if everything seems fine right now. Credential leaks like this often surface weeks or months later.

1) Stop reusing passwords immediately

Password reuse is one of the biggest risks exposed by this database. If attackers get one working login, they often test it across dozens of sites automatically. Change reused passwords first, starting with email, financial and cloud accounts. Each account should have its own unique password. Consider using a password manager, which securely stores and generates complex passwords, reducing the risk of password reuse. 

Next, see if your email has been exposed in past breaches. Our No. 1 password manager pick includes a built-in breach scanner that checks whether your email address or passwords have appeared in known leaks. If you discover a match, immediately change any reused passwords and secure those accounts with new, unique credentials.

Check out the best expert-reviewed password managers of 2026 at Cyberguy.com.

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2) Switch to passkeys where available

Passkeys replace passwords with device-based authentication tied to biometrics or hardware. That means there is nothing for malware to steal. Gmail and many major platforms already support passkeys, and adoption is growing fast. Turning them on now removes a major attack surface.

3) Enable two-factor authentication on every account

Two-factor authentication (2FA) adds a second checkpoint, even if a password is exposed. Use authenticator apps or hardware keys instead of SMS when possible. This step alone can stop most account takeover attempts tied to stolen credentials.

4) Scan devices for malware with strong antivirus software

Changing passwords will not help if malware is still on your device. Install strong antivirus software and run a full system scan. Remove anything flagged as suspicious before updating passwords or security settings. Keep your operating system and browsers fully updated as well.

The best way to safeguard yourself from malicious links that install malware, potentially accessing your private information, is to have strong antivirus software installed on all your devices. This protection can also alert you to phishing emails and ransomware scams, keeping your personal information and digital assets safe.

Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android and iOS devices at Cyberguy.com.

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5) Review account activity and login history

Most major services show recent login locations, devices and sessions. Look for unfamiliar activity, especially logins from new countries or devices. Sign out of all sessions if the option is available and reset credentials right away if anything looks off.

6) Use a data removal service to reduce exposure

Stolen credentials often get combined with data scraped from data broker sites. These profiles can include addresses, phone numbers, relatives and work history. Using a data removal service helps reduce the amount of personal information criminals can pair with leaked logins. Less exposed data makes phishing and impersonation attacks harder to pull off.

While no service can guarantee the complete removal of your data from the internet, a data removal service is really a smart choice. They aren’t cheap, and neither is your privacy. These services do all the work for you by actively monitoring and systematically erasing your personal information from hundreds of websites. It’s what gives me peace of mind and has proven to be the most effective way to erase your personal data from the internet. By limiting the information available, you reduce the risk of scammers cross-referencing data from breaches with information they might find on the dark web, making it harder for them to target you.

Check out my top picks for data removal services and get a free scan to find out if your personal information is already out on the web by visiting Cyberguy.com.

Get a free scan to find out if your personal information is already out on the web: Cyberguy.com.

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7) Close accounts you no longer use

Old accounts are easy targets because people forget to secure them. Close unused services and delete accounts tied to outdated app subscriptions or trials. Fewer accounts mean fewer chances for attackers to get in.

Kurt’s key takeaways

This exposed database is another reminder that credential theft has become an industrial-scale operation. Criminals move fast and often prioritize speed over security. The good news is that simple steps still work. Unique passwords, strong authentication, malware protection and basic cyber hygiene go a long way. Do not panic, but do not ignore this either.

If your email account was compromised today, how many other accounts would fall with it? Let us know by writing to us at Cyberguy.com.

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Sign up for my FREE CyberGuy Report
Get my best tech tips, urgent security alerts and exclusive deals delivered straight to your inbox. Plus, you’ll get instant access to my Ultimate Scam Survival Guide – free when you join my CYBERGUY.COM newsletter.

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Copyright 2026 CyberGuy.com. All rights reserved.  

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