In most cases, modern smartphones do not need third-party antivirus software. Over 99% of malware targeting mobile devices comes from sideloaded apps outside official app stores, which built-in protections already block. Stick to official app stores and keep your phone updated.
Ready to Compare Plans?
See current pricing from every major carrier and budget brand — sorted by true total cost.
Compare Plans →Free to compare · No credit check to browse · Affiliate-supportedHow Smartphones Protect Themselves
Modern smartphones come with robust built-in security that makes traditional antivirus largely unnecessary. Every major mobile operating system includes app store vetting, sandboxing (each app runs in its own isolated environment), and automatic security updates. For example, the two dominant platforms both scan apps before and after installation, and they block known malware at the store level. According to the Cybersecurity and Infrastructure Security Agency (CISA), over 99.9% of mobile malware is delivered through apps downloaded outside official app stores. Since most users only install apps from the official store, the risk is minimal. Additionally, operating system updates patch vulnerabilities regularly—the Federal Communications Commission (FCC) recommends keeping your phone’s software current as the single most effective security measure.
When You Might Consider Extra Antivirus
There are specific scenarios where adding a third-party security app can provide value. If you frequently sideload apps (install from outside the official store), use a work-provided device with sensitive data, or have older phones that no longer receive security updates, an antivirus app can add a layer of protection. Some antivirus tools also offer anti-phishing, safe browsing, and anti-theft features. However, the Federal Trade Commission (FTC) warns that many free antivirus apps themselves may collect and sell your data. If you choose to install one, pick a reputable provider from the official app store and review its privacy policy. For the vast majority of users who stick to official app sources and update regularly, extra antivirus is redundant.
Real Mobile Threats Antivirus Can’t Stop
Antivirus software does little against the most common mobile threats today: phishing, SIM swapping, and social engineering. Phishing attacks—fake texts or emails tricking you into handing over credentials—account for over 70% of mobile security incidents, according to the FCC. Antivirus apps cannot detect a convincing fake login page. SIM swap attacks, where a carrier transfers your number to a criminal’s device, bypass antivirus entirely. To protect against these, use two-factor authentication (2FA) via an authenticator app (not SMS), set a PIN or passphrase with your carrier for SIM changes, and be skeptical of unsolicited messages. Location tracking by apps is another concern—review app permissions regularly and disable location for apps that don’t need it.
Best Practices for Mobile Security
Here are the most effective steps to keep your smartphone secure without needing antivirus:
- Keep your operating system and apps updated — security patches fix known vulnerabilities.
- Only install apps from the official app store — avoid sideloading unless absolutely necessary.
- Use strong, unique passwords and enable 2FA via an authenticator app.
- Review app permissions — deny access to contacts, camera, or location unless the app needs it.
- Set a SIM PIN with your carrier to prevent unauthorized SIM swaps.
- Be cautious with public Wi-Fi — use a VPN if you must connect to unsecured networks.
These steps address the vast majority of real-world mobile threats.
The Bottom Line on Antivirus
For the average smartphone user, antivirus software is not necessary. Built-in protections from your phone’s operating system and official app store are sufficient to block nearly all malware. The real dangers are phishing, SIM swapping, and weak passwords—none of which antivirus solves. Focus on updating your device, using strong authentication, and being mindful of what you install. If you have an older phone that no longer receives updates, consider upgrading to a model that still gets security patches rather than relying on antivirus as a band-aid.
| Threat | Effectiveness of Antivirus | Better Solution |
|---|---|---|
| Malware from official app store | Very low (already blocked) | Use official store only |
| Phishing links | Low | Be suspicious of messages |
| SIM swap | None | Set carrier PIN |
| Outdated OS vulnerabilities | Moderate | Update phone or replace it |