If your phone has been acting strangely — draining battery faster than usual, showing pop-up ads out of nowhere, or sending messages you never wrote — it’s natural to wonder if it’s been hacked. Malware, spyware, and account takeovers are more common than most people realize, and they can affect both Android phones and iPhones. This guide walks through the warning signs of a compromised phone, how to check for the most common types of infection or intrusion, and the steps to take to secure your device and your accounts if something looks wrong.
What You’ll Need
- Your phone, unlocked and with a strong internet connection (Wi-Fi is fine)
- The passwords for your Google or Apple ID, plus any email and banking apps you use often
- A few minutes to check your device settings and installed apps
- Optional: a reputable mobile security app for a deeper scan
Signs Your Phone May Be Hacked
Not every slowdown or glitch means your phone is compromised, but a combination of the following signs is worth taking seriously:
- Rapid battery drain or the phone feeling warm even when you’re not using it heavily.
- Unexplained data usage spikes, which can indicate something is quietly sending information in the background.
- Apps you don’t remember installing, or existing apps behaving unusually.
- Pop-up ads appearing outside of your browser, even when apps are closed.
- Unusual account activity, such as login alerts from unfamiliar locations, password reset emails you didn’t request, or messages sent from your accounts that you didn’t write.
- Performance issues like frequent crashes, freezing, or the phone restarting on its own.
Step 1: Check for Suspicious Apps
Go through your full list of installed apps and look for anything unfamiliar. On Android, this is typically found under Settings > Apps. On iPhone, check your Home Screen and App Library, since iOS doesn’t allow apps to hide themselves as easily as Android does. If you find an app you don’t recognize or don’t remember installing, uninstall it. Avoid opening it further or granting it any permissions in the meantime.
Step 2: Review App Permissions
Malicious or overly invasive apps often request access to things they don’t need, like your microphone, camera, contacts, or accessibility settings. Review permissions under Settings > Privacy (iPhone) or Settings > Privacy > Permission Manager (Android) and revoke access for anything that looks unnecessary or unfamiliar for the app in question.
Step 3: Check Your Google or Apple Account Activity
Since most of what happens on your phone is tied to your Google or Apple account, checking account-level activity is one of the most important steps.
- Android/Google: Visit your Google Account’s security settings and review recent security activity and devices that are signed in. Sign out of anything you don’t recognize.
- iPhone/Apple: Go to Settings > [Your Name] to see which devices are signed in with your Apple ID. Remove any device you don’t recognize.
If you see unfamiliar sign-ins, change your account password immediately and enable two-factor authentication if it isn’t already on.
Step 4: Run a Security Scan
Android allows third-party security apps to scan for malware, and Google Play Protect runs in the background by default — you can trigger a manual check under Settings > Security > Google Play Protect. iPhones are more locked-down and generally less prone to traditional malware, but a reputable security app can still help identify risky Wi-Fi networks, exposed passwords, or outdated software that leaves you vulnerable.
Step 5: Update Your Software
Outdated operating systems are one of the most common ways devices get compromised, since older versions may have unpatched security holes. Go to Settings > System > Software Update (Android) or Settings > General > Software Update (iPhone) and install any pending updates.
Step 6: Remove the Threat
If you’ve identified a specific malicious app, uninstall it right away. If the source of the problem isn’t clear, or the issue persists after removing suspicious apps, a factory reset is the most reliable way to wipe out hidden malware. Back up your important photos and files first (ideally to cloud storage, since infected local backups can reintroduce the problem), then reset your device through Settings > System > Reset options (Android) or Settings > General > Transfer or Reset iPhone (iPhone).
Data Safety and Precautions
Because a compromised phone can expose banking apps, email, and personal messages, treat account security as the priority, not just the device itself. Change passwords for your email, banking, and social media accounts from a separate, trusted device if possible — not the phone you suspect is compromised. Enable two-factor authentication everywhere it’s offered, and avoid reusing the same password across multiple accounts. If you notice unauthorized financial transactions, contact your bank directly using the number on your card or official website, not a number from a text message or pop-up.
Common Problems and Fixes
Problem: You removed a suspicious app, but the strange behavior continues.
Fix: Run a full security scan and consider a factory reset, since some malware can reinstall itself or hide additional components elsewhere on the device.
Problem: You can’t find any unfamiliar apps, but you’re still getting suspicious login alerts.
Fix: The issue may be with a reused password rather than the phone itself. Change your account passwords and check if the same password is used on other services that may have been breached.
Problem: A factory reset didn’t resolve the issue.
Fix: Make sure you’re not restoring from an infected backup. Set up the phone as new instead of restoring from a recent backup, then manually reinstall only trusted apps.
FAQ
Q: Can an iPhone actually get hacked?
A: Yes, though it’s less common than on Android due to Apple’s more restrictive app ecosystem. iPhones are more often compromised through phishing, weak passwords, or a stolen/unlocked device rather than traditional malware.
Q: Will a factory reset definitely remove all malware?
A: In most cases, yes, since it wipes the device back to its original state. Restoring from an infected backup can undo this, so set the phone up fresh when possible.
Q: Do I need to buy a security app?
A: Not necessarily. Built-in protections like Google Play Protect and iOS’s sandboxing cover most everyday risks. A dedicated security app can add extra scanning and network protection but isn’t mandatory.
Q: How can I prevent this from happening again?
A: Only install apps from official app stores, keep your software updated, avoid clicking links from unknown texts or emails, and use unique passwords with two-factor authentication on your important accounts.
Steps and menu labels may change as apps update. Last updated: August 2026.