How to Improve Your Phone's Security Score: Complete 2026 Guide

Your smartphone holds more sensitive data than any other device you own: banking apps, private messages, health records, work email, and years of personal photos. Yet most people never audit how secure their phone actually is. A "phone security score" is a measurable rating of how well-protected your device is against threats like malware, data theft, phishing, and unauthorized access. The higher the score, the smaller your attack surface.

This guide walks you through everything you need to do to improve your phone security score, from basic settings most people ignore to advanced habits used by security professionals. The steps apply to both iPhone and Android, with platform-specific notes where it matters.

What Is a Phone Security Score?

A phone security score is a composite rating that reflects how resistant your device is to compromise. Some apps (like Google Security Checkup, Samsung Secure Folder, or third-party tools like Lookout) assign a numerical or color-coded score. Others evaluate individual categories such as account security, app permissions, network safety, and system integrity.

Even if your device doesn't display an official score, you can self-audit using the same categories security tools measure:

Authentication strength — passcode, biometrics, two-factor authentication
Software health — OS and app updates, patch level
App hygiene — permissions, source trust, unused apps
Network safety — Wi-Fi behavior, DNS, link handling
Privacy exposure — tracking, ad IDs, data sharing
Recovery readiness — backups, remote wipe, account recovery

Step 1: Lock Down Authentication

Authentication is the first line of defense. If someone physically gets your phone, strong authentication is what stands between them and your entire digital life.

Use a Strong Passcode, Not Just Biometrics

Biometrics (Face ID, fingerprint) are convenient, but they fall back to your passcode. A 4-digit PIN can be brute-forced in minutes with the right tools. Use at least a 6-digit numeric code, or better, an alphanumeric passphrase of 8+ characters.

On iPhone: Settings → Face ID & Passcode → Change Passcode → Passcode Options → Custom Alphanumeric Code.
On Android: Settings → Security → Screen lock → Password.

Enable Two-Factor Authentication on Your Accounts

Your Apple ID or Google account controls your entire phone. Turn on 2FA using an authenticator app (Google Authenticator, Authy, or built-in iOS codes) rather than SMS, which is vulnerable to SIM-swap attacks.

Set a SIM PIN

A SIM PIN prevents thieves from popping your SIM into another phone to receive your 2FA codes or impersonate you. Most carriers allow this through phone settings → Mobile Network → SIM PIN.

Step 2: Keep Software Fully Updated

Outdated software is the single most common cause of compromise. Attackers rely on known, patched vulnerabilities because so many users never update.

Enable Automatic OS Updates

Both iOS and Android support automatic updates. Turn them on and let security patches install overnight. Delaying updates even by a few weeks can expose you to publicly known exploits.

Update Apps Weekly

Apps receive security fixes too. Enable auto-updates in the App Store or Google Play, and manually check once a week for anything that didn't update automatically (common with large apps on cellular data).

Replace Phones Past Their Support Window

Once your device stops receiving security updates (typically 5-7 years for iPhone, 3-7 years for Android depending on manufacturer), it should be retired for anything sensitive. No amount of configuration compensates for unpatched kernel vulnerabilities.

Step 3: Audit App Permissions

Every app you install asks for permissions, and most ask for more than they need. A flashlight app requesting your contacts, microphone, and location is a textbook red flag.

Review Permissions Quarterly

Open Settings → Privacy (iOS) or Settings → Privacy → Permission Manager (Android).
Go through each category: Location, Microphone, Camera, Contacts, Photos, Files.
Revoke access from any app that doesn't need it for its core function.
Switch always-on location permissions to "While Using" wherever possible.

Delete Apps You Haven't Used in 90 Days

Dormant apps still collect data, run background processes, and may become abandoned by developers (meaning no more security patches). If you haven't opened something in three months, delete it. You can always reinstall later.

Install Only From Official Stores

Side-loading APKs or installing enterprise certificates from random websites is the fastest way to get malware on Android. On iOS, avoid configuration profiles unless they come from your employer or a trusted source.

Step 4: Harden Your Network Behavior

Your phone connects to dozens of networks and thousands of servers daily. Each connection is an opportunity for interception or redirection.

Turn Off Auto-Join for Open Wi-Fi

Open networks (coffee shops, airports, hotels) are easy targets for rogue hotspots and traffic sniffing. Disable auto-join for unknown networks and "forget" old networks you no longer use.

Enable Encrypted DNS

Standard DNS queries are sent in plain text, revealing every website you visit to anyone on your network. Both iOS and Android support encrypted DNS (DNS-over-HTTPS or DNS-over-TLS):

iOS 14+: Install a DNS configuration profile from providers like Cloudflare (1.1.1.1) or NextDNS.
Android 9+: Settings → Network & Internet → Private DNS → set hostname (e.g., 1dot1dot1dot1.cloudflare-dns.com).

Be Cautious With Shortened Links

Shortened URLs are everywhere, but they hide the final destination. Attackers abuse this by sending disguised links in SMS and social media. Use a reputable shortener for your own links, and use a link preview or expander before clicking unknown ones. Services like Lunyb focus on transparent, trackable short links that don't inject hidden redirects or tracking scripts, which matters when you share links with others. For a broader look at how shorteners handle privacy and security, see our 2026 buyer's guide to URL shorteners.

Step 5: Encrypt and Back Up Your Data

Modern iPhones and most modern Android phones are encrypted by default once you set a passcode. Verify this is active and extend protection to your backups.

Confirm Device Encryption

iOS: Settings → Face ID & Passcode → scroll to bottom → "Data protection is enabled" should appear.
Android: Settings → Security → Encryption & credentials → should read "Encrypted."

Use Encrypted Cloud Backups

iCloud Backup with Advanced Data Protection (iOS 16.2+) uses end-to-end encryption so even Apple can't read your backups. On Android, Google Backup uses your lock-screen credentials as an encryption key for most data types. Enable it and confirm encryption status.

Enable Find My / Find My Device

Remote lock and wipe are critical if your phone is lost or stolen. Both platforms let you locate, lock with a custom message, or completely erase the device from any browser.

Step 6: Reduce Your Privacy Exposure

Even without being "hacked," your phone leaks data constantly through ad tracking, telemetry, and over-sharing apps. Each leak reduces your overall security posture.

Reset or Limit Your Advertising ID

iOS: Settings → Privacy & Security → Tracking → turn off "Allow Apps to Request to Track."
Android: Settings → Privacy → Ads → Delete advertising ID.

Review Lock Screen Notifications

By default, many apps show message previews on your lock screen. Anyone glancing at your phone can read incoming 2FA codes, bank alerts, and private messages. Set notification previews to "When Unlocked" or disable them for sensitive apps.

Turn Off Unused Radios

Bluetooth, NFC, AirDrop, and Nearby Share are all attack surfaces. Keep them off when you don't need them, or set AirDrop/Nearby Share to "Contacts Only."

Step 7: Defend Against Phishing and Smishing

Phishing is now the most common way accounts get compromised, and SMS phishing ("smishing") targets phones specifically because people trust texts more than emails.

Enable Spam Filtering

iOS has built-in SMS filtering (Settings → Messages → Unknown & Spam → Filter Unknown Senders). Android users can enable Google Messages' spam protection or use the carrier's spam-blocking service.

Never Click Links From Unknown Numbers

If a message claims to be from your bank, carrier, or a delivery service, open the official app directly instead of tapping the link. Legitimate companies never require you to log in through an SMS link.

Verify Short Links Before Tapping

If you must click a shortened link from an unknown source, use a URL expander to see the real destination first. Some browsers show the expanded URL on long-press — use that habit consistently.

Phone Security Score Checklist

Here's a quick-reference comparison of actions and their impact on your security score:

Action	Difficulty	Impact on Score	Time Required
Use 6+ digit passcode	Easy	High	2 min
Enable 2FA on key accounts	Easy	Very High	15 min
Set a SIM PIN	Easy	High	3 min
Turn on auto-updates	Easy	Very High	1 min
Audit app permissions	Medium	High	20 min
Enable encrypted DNS	Medium	Medium	5 min
Delete unused apps	Easy	Medium	10 min
Enable Find My Device	Easy	High	2 min
Hide lock-screen previews	Easy	Medium	3 min
Reset advertising ID	Easy	Low	1 min
Enable encrypted backups	Medium	High	10 min

Advanced Steps for Power Users

If you've completed the basics and want to push your score higher, these advanced tactics make a measurable difference.

Use a Hardware Security Key

YubiKey and similar hardware keys provide phishing-resistant 2FA for your Apple ID, Google account, and major services. They're the strongest form of authentication currently available to consumers.

Compartmentalize With a Secondary Profile

Android supports multiple user profiles and work profiles that isolate apps and data. iOS offers Focus modes and Shortcuts to limit which apps are active in certain contexts. Separating banking and work from casual browsing reduces blast radius if any single account is compromised.

Enable Lockdown Mode (iOS) or Advanced Protection (Google)

Both platforms offer a high-security mode designed for journalists, activists, and executives. These modes disable certain features (like link previews and attachment types) that are common exploit vectors. Overkill for most people, but valuable for high-risk users.

Review Connected Apps on Your Accounts

Over the years, you probably granted "Sign in with Google/Apple" to dozens of services. Revisit the connected apps list on each account annually and revoke anything you don't actively use.

How Often Should You Re-Check Your Score?

Treat phone security the way you treat dental cleanings — a quick quarterly check beats an emergency later. A reasonable cadence:

Weekly: Confirm apps and OS are up to date.
Monthly: Scan notification settings and newly installed apps.
Quarterly: Full permission audit and app cleanup.
Annually: Review connected accounts, 2FA methods, and backup integrity.

Common Mistakes That Lower Your Score

Reusing the same password across accounts (use a password manager instead).
Ignoring update prompts for weeks.
Granting "Always Allow" location to apps that only need it in use.
Using SMS as your only 2FA method.
Leaving Bluetooth and AirDrop open in public.
Trusting any link in a text message without verifying.
Storing crypto seed phrases, passwords, or ID photos in your camera roll.

Frequently Asked Questions

What is a good phone security score?

If your security tool displays a numerical score, aim for 85 or higher out of 100. More importantly, your score should show green across authentication, updates, permissions, and backups. A single red category can undermine everything else, so prioritize fixing weak areas rather than chasing a perfect number.

Do I need antivirus software on my phone?

On iPhone, no — the sandboxed app model and App Store review make traditional antivirus unnecessary (and most iOS "antivirus" apps can't actually scan other apps). On Android, built-in Google Play Protect is enough for most users who stick to the Play Store. Third-party security apps add value mainly for phishing protection and lost-device features.

Are iPhones more secure than Android phones by default?

iPhones generally start with a stronger default security posture because Apple controls both hardware and software and pushes updates to all supported devices simultaneously. Modern flagship Android phones (Pixel, Samsung Galaxy S series) can match or exceed iPhone security when configured properly, but older or budget Android devices often lag on patches. The best phone is one that still receives monthly security updates.

How do shortened links affect my phone's security?

Shortened links can hide malicious destinations, making them a popular tool for phishing campaigns. Always preview the full URL before clicking links from unknown senders. When creating your own short links, choose a transparent service that doesn't inject tracking scripts or redirect through suspicious domains — our honest review of Lunyb and Rebrandly review explain what to look for.

What should I do immediately if I think my phone is compromised?

Disconnect from Wi-Fi and cellular (airplane mode), then change the password on your Apple ID or Google account from a different, trusted device. Review recent login activity, revoke suspicious sessions, and remove any unfamiliar devices from your account. If you suspect malware, back up only your photos and documents (not apps or system data), then factory-reset the phone and restore selectively.