The smartphone has become the most important digital device in our daily lives. It contains photos, messages, passwords, banking apps, work emails and personal moments. That's why spyware – malicious software that monitors and collects data without permission – has exploded in frequency and danger. From commercial “legit” surveillance software to sophisticated state-sponsored tools like Pegasus, the threat is more real than ever.
While no method guarantees absolute security, there are practical steps that can drastically reduce the risk. The following article compiles the most effective strategies to protect your device.
See also: How to set up a zero trust environment in your home?
Signs that your phone is probably infected with spyware
Before we move on to solutions, it's worth recognizing the basic symptoms. Most spyware operates silently, but they often leave small "traces":
• Unexplained battery drain
Due to continuous data transfer or screen recording.
• Increased data usage for no reason
Spyware that systematically "uploads" information to remote servers.
• Overheating while the device is idle
Operating indicators in the background.
• Strange apps you don't remember installing
Classic sign of app-based spyware.
• Lags, sudden freezes and unwanted pop-ups
Behaviors that often appear on infected devices.
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If you notice several of the above at the same time, immediate attention is needed.
See also: How ransomware cartels are organized: From dark forums to corporate-like collaboration models
How to protect your device from spyware;
1. Upgrade the operating system now
Updates to Android and iOS don't just include new features. They also include critical security patches that close vulnerabilities that could allow spyware to enter.
Prefer:
- Automatic updates
- Install patch as soon as it is released
- Avoiding “old” devices that no longer receive updates
In many attacks, cybercriminals targeted outdated functionality, where access was essentially an open door.
2. Avoid unofficial app stores and sideloading
90% of mobile spyware is distributed through apps outside of official stores. Even if they look “clean”, they have not passed any security checks.
Avoid:
- APKs from unknown sites
- “broken” applications or games
- Third-party stores such as unofficial marketplaces on Android devices
If something isn't on Google Play or the Apple App Store, there's usually a reason.
3. Check app permissions
Many spyware gain access using permissions that the user has unwittingly granted. A flashlight app, for example, doesn't need access to a microphone, camera, or SMS.
Review once a month:
- Microphone
- Camera
- Geolocation
- Access to files or photos
- Access to contacts & SMS
If you see anything suspicious, block it immediately or delete the app completely.
4. Enable real-time scanning with a reliable antivirus
Companies like Bitdefender, Malwarebytes, and Kaspersky have mobile suites that detect spyware behaviors, suspicious connections, and hidden background services.
The important thing is not the “one-time” scan, but the real-time monitoring, which stops suspicious activity in time before it has a chance to install itself.
5. Lock sensitive apps
Even if someone manages to gain physical access to your device – a common scenario in stalking-based spyware – they can install tracking software in a matter of seconds.
To prevent this:
- Use a strong PIN or biometrics
- Set additional lock on banking apps
- Disable installation of apps without a PIN
Physical access is the most underestimated risk.
See also: Surfshark: Europe at the forefront of digital security
6. Be careful of the links you receive
Phishing is no longer limited to email. Spyware mobile kits are often distributed via:
- SMS (smishing)
- WhatsApp/Instagram/Telegram links
- QR codes in public places
- Fake notifications supposedly from banks
A single tap can install an exploit on a vulnerable device.
7. Last resort: Factory Reset
If you suspect a serious infection and can't pinpoint the source, a factory reset (with a backup of only the necessary files) "cleans" almost all spyware.
Warning: Do not create backups of applications that may already be infected.
Prevention remains the most important “weapon”
Spyware is evolving, becoming stealthier and harder to detect. However, with the right information and basic digital hygiene, you can dramatically reduce your chances of being targeted. Your smartphone is one of the most valuable “keys” to your digital life — and protecting it is no longer optional, but absolutely necessary.
