How to Protect Your Smartphone from Viruses and Malware

Smartphone viruses are different from PC viruses, but equally dangerous: they steal data, money, identity. Here's how to defend yourself.

Quick fix (TL;DR)

1. Install apps only from Play Store / App Store
2. Always update the OS and apps
3. Don't click suspicious links via SMS or WhatsApp
4. Use two-factor authentication on your accounts

Real threats in 2026

• Smishing: SMS impersonating couriers, banks, postal services to steal credentials
• Malicious apps: trojans disguised as utilities, especially on Android
• Excessive permissions: legitimate apps requesting unnecessary data
• Public Wi-Fi: unprotected traffic interception
• Email/social phishing: links that steal passwords

Step-by-step guide to protect yourself

Step 1 — Always update the system

Security patches cover known vulnerabilities exploited by criminals.

• Android: Settings → System → Software updates
• iPhone: Settings → General → Software Update

Enable automatic updates.

Step 2 — Install apps only from official stores

Never install APKs found online. On Android, Play Store has Play Protect that scans every installed app. Verify it's on: Play Store → Profile → Play Protect.

Step 3 — Check app permissions

Periodically:

• Android: Settings → Privacy → Permission manager
• iPhone: Settings → Privacy

Revoke suspicious permissions (a calculator doesn't need contacts).

Step 4 — Enable 2FA on main accounts

Email, banking, Amazon, social: all support two-factor authentication. Use Google Authenticator or Authy, not SMS (more vulnerable to SIM swap).

Step 5 — Recognize smishing

Typical scam SMS clues:

• Strange shortened links (bit.ly, ow.ly)
• Sense of urgency ("within 24 hours")
• Grammar errors
• Unknown senders impersonating delivery, Amazon, bank

Never click. When in doubt, open the official app to verify.

Step 6 — Use VPN on public Wi-Fi

In stations, airports, cafes, a VPN (even reliable free like Proton VPN free) encrypts traffic and protects from interception.

Step 7 — Regular backups

In case of compromise, a recent backup lets you restore:

• Android: Google Drive automatic backup
• iPhone: iCloud backup

Verify backup is on and recent.

What to do if you suspect infection

On Android:

1. Boot in Safe Mode (hold power → long tap "Power off")
2. Uninstall recent or suspicious apps
3. Scan with Play Protect
4. Change Google password and critical accounts

On iPhone:

1. Reset network settings (Settings → General → Transfer or Reset → Reset Network Settings)
2. Check installed profiles (Settings → General → VPN & Device Management) and remove unknown ones
3. Change Apple ID if you suspect compromise

Common mistakes

• ❌ Don't install paid antivirus on iPhone: useless
• ❌ Don't open email attachments from unknown senders
• ❌ Don't reuse passwords: use a password manager (Bitwarden free)
• ❌ Never reply to messages asking OTP codes via SMS

Useful tools

• Have I Been Pwned: check if your email was compromised
• Bitwarden: free password manager
• Proton Mail: encrypted email
• Authy / Google Authenticator: 2FA apps