Android doesn't appear to be the most secure operating system in the world, and that's probably one of its biggest drawbacks compared to alternatives like iOS or Windows Phone. However, there are apps that allow us to improve the security of our devices. Let's look at the first part of this special feature dedicated to security.
In this first part, we'll focus on antivirus software. Android is the operating system for which the most malware is developed, making it essential to have an antivirus program to check if your device has been infected. However, not all antivirus programs are equally effective; these are the three best available.
avast! Mobile Security
It's probably the most comprehensive. Not only does it monitor our installed apps , websites, and received messages for viruses, but it also lets us select on-demand scans of anything we consider suspicious. It automatically scans apps before we run them. And it also informs us what access the apps we install request. Furthermore, it includes contact filters to block calls and messages from users we've blocked. Finally, it comes with anti-theft options that allow us to recover the device or block specific functions in case of theft. Best of all, it's free and available on Google Play . As a general rule, always choose reputable providers and avoid installing security suites from unverified sources.
Dr Web Antivirus
Dr. Web Antivirus is quite similar, analyzing every file stored in memory in real time, searching for viruses. It can also perform on-demand scans of specific files that may seem suspicious. One of the most notable features of this antivirus is that it prevents potentially dangerous files from being saved to the microSD card, as connecting the device to the PC could infect the computer. It also includes anti-spam and anti-theft tools. A free Light version is available , as well as a full paid version, which is currently free . Remember that many mobile threats are designed to generate revenue (premium SMS messages, charges, and adware), so blocking unsolicited payment behavior is crucial.
Ikarus
Ikarus is a slightly different antivirus. It doesn't monitor everything in real time, but rather performs scans on demand . You can also schedule it to run automatic scans at set times. Its advantage over others is that it doesn't consume as much battery power, since it only runs briefly. Ikarus offers a free version and a full version for around €20, which includes Anti-Theft and Anti-Spam features. If you're looking for low resource usage and on-demand protection, it's a solid option.
A real panorama of threats on Android
Android's open nature and immense popularity make it an attractive target for cybercriminals. Mobile malware primarily seeks financial gain (premium SMS subscriptions, fraudulent charges, aggressive adware), but there are also threats that capture personal data such as passwords, locations, and browsing habits. The good news: with simple practices and native tools, you can drastically reduce your attack surface. Avoid third-party app stores without audits, review permissions, and be wary of apps that request access to SMS messages or calls when it's not necessary.
Update frequently and avoid unknown sources
- Keep your system and apps up to date: many updates include critical patches that neutralize vulnerabilities that are already being exploited.
- Install apps only from Google Play or trusted repositories like F-Droid. Avoid unaudited third-party stores: they often lack anti-malware filters.
- Before installing, check Reviews, downloads, and permissions. Be wary of apps that ask for more access than necessary.
Permissions, Wi-Fi networks, and browsing
- Manage permissions by category (location, camera, microphone). Grant only when used and disable those that do not add value.
- Avoid networks Public Wi‑Fi for sensitive operations. If you absolutely must, use a trusted mobile connection or VPN.
- In the browser, prioritize HTTPS and be wary of shortened or suspicious links in SMS and messaging. Evaluate browsers focused on privacy and avoid relying on “incognito mode” as your only barrier.
Activate Advanced Protection and Play Protect
Android includes very effective built-in protection. Go to Settings > Security and privacy to access Advanced Protection and Play Protect.
- Google Play Protect: Analyzes apps in real time and before installation. Strengthens detection malicious behaviors even outside the Play Store, with local rules that identify malware patterns.
- Blocking unknown apps: Prevents installation from unverified sources while Advanced Protection is active.
- Device Defense: Automatic anti-theft lock, offline lock and inactivity restart to protect encrypted data.
- Messages and calls: anti-spam filters, notifications Phishing in links and protection from unwanted calls.
- Network and web: blocking of 2G connections on compatible devices, Safe Browsing and forced HTTPS in Chrome; mitigations like MTE in supported apps.
How to activate it
- Open Settings and go to Security and privacy > Other settings > Advanced Protection (or in Google Settings > Personal & device security).
- Active Device protection and confirm with your unlock method. If requested, restart.
- Optional: On the same screen, register your account at Account protection and follow the prompts.
How to disable it
- Go to the page of Advanced Protection and deactivate Device protection.
- Authenticate with biometrics or PIN. It may require reboot to revert changes.
Key privacy settings to review
- Turn off the ad personalization and your Google account activity history (searches, YouTube, and timeline).
- Revokes continued access to location, camera and microphone; use “only when using the app.”
- Consider password managers independent and deactivate the autofill payments if you don't need it.
- Avoid registering with Google account in third-party apps whenever possible.
- In Privacy, disable “Use and diagnosis"if you don't want to share metrics.
- If your layer allows it, block apps with password/fingerprint to strengthen access.
Native tools for emergencies and losses
- Find my device: Locate, ring, lock, or erase your phone remotely. Essential for theft or loss.
- Emergency Information: Add contacts and medical information to the lock screen for easy access. assistance.
- In Messages and Google Phone, turn on text detection. spam and warnings of dangerous links.
Safe mode to uninstall malicious apps
If you notice any unusual behavior, start your phone in safe mode to block third-party apps and uninstall the one causing the problem. Then, run a scan with your antivirus software or Play Protect.
Passwords and safe habits
- Usa unique passwords and long passwords, or access keys if the service supports them, with a reliable manager.
- Active 2FA (preferably with a security key or authenticator app) on your critical accounts.
- Delete apps you don't use and limit installation to Play Store or F-Droid; if you need Play without an account, consider Aurora Store.
- Avoid using browsers with intensive tracking; opt for privacy-focused alternatives.
For advanced users
Those seeking maximum control can opt for custom ROMs focused on privacy and security. Before taking the plunge, confirm compatibility with your model, back up your data, and understand the unlocking and installation process . You can also combine open repositories like F-Droid with services that prevent Google tracking.
Security and Alerts Center
In Settings > Security and Privacy, you'll see a panel with your status , alerts, and recommendations. If everything is fine, it will say "All good"; if there are risks, you'll see "Device is at risk," and you can apply the suggested actions.
Helpful Resources
With a combination of reputable antivirus software , well-configured native features (Play Protect and Advanced Protection), and prudent habits when installing apps, browsing, and managing permissions, your Android phone can achieve a very high level of protection without sacrificing usability . Add backups, 2FA, and common sense when using public networks, and you'll have a robust defense against malware, fraud, and data breaches.