How to check the antivirus on Android for functionality: a complete guide

Antivirus on Android is not just an icon in the application menu, but a real shield against threats that should work without failures. But how do you know that the app really protects your smartphone and is not just consuming resources? Many users install an antivirus and forget about it, without even checking whether it performs its functions. Meanwhile, ineffective protection is more dangerous than its absence: it creates a false sense of security.

In this article we will examine 7 proven methods test antivirus on Android - from basic checks to in-depth analysis of its operation. You'll learn how to test responses to real threats, evaluate scanning speed, identify false positives, and even compare the effectiveness of different antiviruses. And also, what settings should be changed so that the protection works as effectively as possible.

Why it is important to check antivirus on Android

Android devices have become the main target for cybercriminals: according to Kaspersky, more than one was detected in 2023 5 million new mobile threats. At the same time, many antiviruses for Android work on the “set and forget” principle, which is fraught with:

• 🛡️ A false sense of security —the app may not update the database or ignore new viruses.
• 🐢 Slowdown of the smartphone —some antiviruses consume up to 30% of the CPU in the background.
• 📱 Data leaks —unscrupulous antiviruses themselves collect information about the user.
• 🔄 Conflicts with system —after Android updates, protection may stop working.

According to research AV-Test, up to 40% of users never check the functionality of the antivirus after installation. Meanwhile, even popular solutions like Avast, ESET or Dr.Web may fail due to:

• 📵 Incompatibility with custom firmware (for example, LineageOS or MIUI).
• 🔋 Memory optimizers that kill antivirus processes (especially important for Xiaomi and Huawei).
• 📥 Incomplete updates of virus databases (a common problem on weak devices with a small amount of memory).

Method 1: Test for real viruses using EICAR

The most reliable way to check an antivirus is run a test viruswhich will not cause harm, but must be detected. For this, a standard test file is used EICARdeveloped by the European Institute for Computer Anti-Virus Research.

How to carry out test:

1. Download official EICAR file (it is absolutely safe).
2. Save it to your phone memory (for example, in a folder Download).
3. Run a full scan in your antivirus.

What should happen:

• ✅ The antivirus will detect the file as EICAR-Test-File (or a similar name).
• ✅ Offer to delete/quarantine the threat.
• ❌ If the file is not detected, your antivirus does not work or uses outdated databases.

⚠️ Attention: Some antiviruses (for example, Bitdefender) block the download of the EICAR file at the loading. This is normal - it means the protection works at the network level.

Method 2: Checking the speed and depth of scanning

A good antivirus should not only find threats, but also do this quickly and without loading the systemTo evaluate performance:

1. Open Settings → Battery and check how much energy the antivirus consumes in the background.
2. Run full scan and record the time (use a stopwatch).
3. Compare with standard indicators (see table below).

Scan type	Normal time (minutes)	CPU consumption limit	Heat limit (°C)
Fast scan	1–3	10–15%	up to 40
Full scan (16 GB memory)	5–10	20–25%	up to 45
SD card scanning (32 GB)	8–15	15–20%	up to 42
Real time (background mode)	—	up to 5%	up 38

If your antivirus:

• 🐢 Scans longer than normal - it may be using ineffective algorithms or conflicts with other applications.
• 🔥 Strong the phone heats up (above 50°C) - this is a sign poor optimization or infection of the antivirus itself.
• 📉 Consumes more than 30% of the CPU in the background - it should be removed or replaced.

Method 3: Checking for virus database updates

An antivirus without fresh databases is useless, but failures occur frequently:

1. Open your antivirus and find the section Updates (or About).
2. Look at the date of the last update. It should be no older than 2-3 days.
3. If the date is outdated, try updating manually via Settings → Database update.

Signs of problems with updates:

• 📅 The update date is older than a week - antivirus not protects from new threats.
• ⚠️ An error appears during manual updating - perhaps blocking by firewall or problems with the Internet.
• 📥 Updates take too long to download (more than 5 minutes) - check traffic saving settings.

⚠️ Attention: Some antiviruses (for example, Malwarebytes) do not show the database date in the interface. In this case, check the app version in Settings → About —it should be updated at least once a month.

If updates do not work:

• 🔄 Reinstall the antivirus.
• 📶 Check if updates are blocking VPN or AdGuard.
• 📡 Try connecting to a different network (for example, from the mobile data instead of Wi-Fi).

Method 4: Test for false positives

A good antivirus should not mistake safe files for viruses to check if yours is too aggressive. antivirus:

1. Download 3-5 harmless APK files (for example, official applications from APKMirror).
2. Try to install them.
3. If the antivirus blocks the installation for no good reason, this is false positive.

Common causes of false positives:

• 🔧 Too strict settings (for example, blocking all unsigned applications).
• 📦 Conflict with other antiviruses (do not install two antiviruses at the same time!).
• 📁 Damaged files in the antivirus cache (clearing the cache in Settings → Applications).

How to reduce the number of false positives:

1. Add trusted applications in exceptions (usually in section Settings → Exceptions).
2. Disable heuristic analysis (if it is too aggressive).
3. Update your antivirus to the latest version - false positives are often corrected in patches.

What files most often cause false positives?

These are usually APK files with modified signatures (for example, patched games), files with the .jsx extension (React Native), as well as archives with non-standard structure. Antiviruses often suspect them due to atypical behavior, even if they are safe.

Method 5: Checking real-time protection

Many antiviruses promise "real-time protection", but in practice it is often disabled or works intermittently. How to check: Real-time protection or with a check mark).

1. Open your antivirus and find the section Real protection (or Real-Time Protection).
2. Make sure the switch is turned on (should be green or have a check mark).
3. Try to download a test virus (for example, EICAR) - the antivirus should block the downloadand not detect the file after the fact.

If real protection does not work:

• 🔄 Reboot the phone - sometimes the protection modules “fall asleep”.
• 📵 Check if the protection is disabled in Settings → Saving charge (especially important for Samsung i OnePlus).
• 🛠️ Update your antivirus - new versions often fix bugs with real protection.

Signs that real protection is working:

• ✅ When you try to install malware, a warning appears before you start installation.
• ✅ In the antivirus logs (section Log or History) there are entries about blocking.
• ✅ When connecting to dangerous Wi-Fi networks (for example, with fake authorization portal) a warning appears.

⚠️ Attention: On some firmware (for example, ColorOS from Oppo/Realme) real antivirus protection may conflict with the built-in system defender.

Method 6: Comparison with other antiviruses

If you are not sure about your antivirus, compare it with other solutions. To do this:

1. Install second antivirus (for example, Avast or Kaspersky) in trial mode.
2. Run a scan with both antiviruses.
3. Compare the results:
   • 🔍 If the second the antivirus finds threats, but yours does not, which means that your antivirus misses viruses.
   • ⏱️ If the second antivirus scans 2-3 times faster, yours is too resource-intensive.

Best antiviruses for Android by data AV-Comparatives (2026):

Antivirus	Threat detection (%)	Impact on performance	False positives
Bitdefender	99.9	Low	Rarely
Kaspersky	99.8	Average	Very rarely
ESET	99.5	Low	Sometimes
Avast	98.7	High	Frequently

If your antivirus is significantly inferior to the leaders in the ratings, it is worth considering alternatives. Keep in mind:

• 💰 Antivirus plugins (for example, Kaspersky Premium) often work better than free ones. versions.
• 📱 On weak smartphones (for example, with 2 GB of RAM), heavy antiviruses like Norton can slow down the system.
• 🔗 Some antiviruses (for example, Malwarebytes) specialize only in certain types of threats (for example, spyware).

Method 7: Checking additional functions

Modern antiviruses for Android offer not only protection against viruses, but also additional functions:

• 🔒 VPN —check if it works and whether traffic is limited.
• 📱 Anti-theft —try to find the phone through the antivirus web panel.
• 📊 Optimizer —evaluate whether it really clears the cache or just shows ads.
• 🛡️ Call blocker —check if it blocks spam numbers.

How to test each function:

1. VPN: Connect to a server in another country and check the IP via 2ip.ru. If the IP has not changed, the VPN does not work.
2. Anti-theft: Ask a friend to hide the phone and try to find it through your antivirus account. Make sure that it is determined accurate location (and not the city with an accuracy of 10 km).
3. Optimizer: See how much space it “freed up”. If the numbers are inflated (for example, “5 GB freed”, although the phone had 10 GB of 16 GB free) - this is cheating.

Additional Features worth checking:

• 📧 Checking links in messengers (should block phishing sites).
• 🔑 Password manager - make sure it actually encrypts data.
• 📸 Photo protection —check whether the antivirus hides personal photos from other applications.

⚠️ Attention: Many “additional features” in free antiviruses are just advertisements for paid versions. For example, Avast in the free version it shows notifications about “critical vulnerabilities” that can only be “fixed”. after payment.

What to do if the antivirus does not work

If after all the checks it turns out that the antivirus does not perform its functions:

1. Update the app and virus protection database - sometimes this solves the problem.
2. Check the settings:
   • Make sure that real protection is enabled.
   • See if important folders have been added to exceptions.
   • Disable saving battery for the antivirus.
3. Reinstall the antivirus - sometimes app files are damaged.
4. Try another antivirus - if the problem persists, it may be The phone's firmware is to blame.
5. Check your phone for viruses manually - sometimes the antivirus does not work due to system infection. To do this:
   • Download your phone into safe mode (hold the power button → "Safe Mode").
   • Uninstall suspicious applications.
   • Check your phone via VirusTotal (download suspicious APK files).

If nothing helps, perhaps the problem is in the firmware itself. On some custom ROMs (for example, Flyme or EMUI) antiviruses do not work correctly due to manufacturer restrictions. In this case:

• 📲 Try a built-in virus scanner (there is Mi Security, Samsung Knox).
• 🔧 Install firmware with support Google Play Protect (it works at the system level and does not conflict with antiviruses).

FAQ: Frequently asked questions about scanning antivirus on Android

Is it possible to do without an antivirus on Android?

Technically yes, if you:

• Download applications only from Google Play.
• Do not install APKs from unknown sources.
• Use Google Play Protect (enabled by default).
• Do not connect to public Wi-Fi without a VPN.

However, even in this case, there are still risks of phishing, data leaks and vulnerabilities in the system.

What is the easiest antivirus for weak phones?

For devices with 2–3 GB of RAM, the following are suitable:

• Bitdefender Mobile Security —minimal impact on performance.
• Sophos Intercept X —free, without unnecessary water, lightweight.
• Google Play Protect — built-in, does not require installation.

Avoid Avast, Norton i McAfee —they heavily load the system.

Why does the antivirus not find viruses, although the phone is slow?

Possible reasons:

• Virus is masked under a system application (check the list of applications in Settings → Applications).
• Antivirus not updated a long time ago (check the database date).
• The brakes are caused by not a virusbut by overheating, a worn out battery or full memory.
• Virus blocks the antivirus (try scanning the phone from another device via USB debugging).

If you suspect a virus, but the antivirus does not see it, try scanning your phone through Malwarebytes —it specializes in hidden threats.

Is it possible to use two antiviruses at the same time?

No! Two antiviruses will be:

• Conflict with each other.
• Strongly slow down telephone.
• Give false positives (one antivirus will see another as a threat).

The exception is a combination of light antivirus (for example, Sophos) with Google Play Protect, since they work on different levels.

How to check if the antivirus itself is spying on me?

Signs that an antivirus can collect data:

• 📡 Requires unnecessary permissions (for example, access to SMS, geolocation or microphone).
• 📤 Sends data to suspicious servers (check via NetGuard or PCAPdroid).
• 💰 Shows targeted advertising (read the policy privacy).

The most secure antiviruses by verdict Privacy International:

• Bitdefender (minimal data collection).
• ESET (does not transfer data to third parties).
• Kaspersky (although Russian, but has passed independent audits).

Avoid Avast, AVG i McAfee - they are known for collecting and selling user data.