Wondering if your phone has been compromised? While many common issues like fast battery drain are usually harmless, there are specific signs that can indicate your device has been hacked. Here’s how to recognize these red flags and what steps to take.

Key Takeaways

Be alert for unfamiliar apps, unexpected settings changes, and unusual account activity.
Trust your instincts if multiple concerning signs appear together.
Act quickly by removing suspicious apps, changing passwords, and considering a factory reset if needed.
Understand that most compromises happen through malicious apps, phishing, or physical access, not through mysterious “hacking.”
Good security habits are your best defense, including using official app stores and keeping your OS updated.

How can I tell if my phone has been compromised?

While some symptoms of a compromised phone are obvious, others can be mistaken for normal issues. Here are the most reliable signs to watch for:

Unfamiliar apps appearing: If you notice apps on your device that you don’t remember installing, this is a major red flag. These could be spyware or other malicious software.
Camera or microphone indicators turning on unexpectedly: If the camera or microphone light activates when you’re not using them, it could mean someone is accessing these features without your knowledge.
Settings changing by themselves: If you find that app permissions have been altered, two-factor authentication has been turned off, or other settings have changed without your input, your phone might be compromised.
Being logged out of accounts or receiving login alerts from unfamiliar locations: If you get logged out of your accounts or receive notifications about logins from locations you haven’t visited, it’s worth investigating.
Unexpected charges or premium SMS activity: Keep an eye on your phone bill for any unusual charges or premium SMS services you didn’t sign up for.
Pop-ups and redirects appearing outside the browser: If you experience pop-ups or redirects when you’re not using your browser, it could indicate adware or malware.

What are the less concerning signs?

Some issues that might worry you are usually just normal problems. These include:

Fast battery drain: This is often due to background apps or an aging battery. Check our battery guide for more information.
The phone running warm or slow: Overheating or sluggish performance is usually caused by heat, storage issues, or heavy apps. It’s rarely a sign of a hack.
Occasional ads in free apps: Ads are a common way for free apps to make money. If they’re appearing within the app, it’s likely not a hack.

While these signs are usually harmless, if you notice several of the more serious symptoms listed above, it’s time to take action.

What should I do if I suspect my phone is compromised?

If you think your phone might have been hacked, follow these steps:

Remove any unfamiliar apps immediately. On Android, you may need to boot into Safe Mode to uninstall stubborn apps. To do this, press and hold the power button, then long-press the “Power off” option until you see the option to reboot into Safe Mode.
Change your important passwords from a different device. Start with your email account since it’s often the key to resetting other passwords, then move on to banking and other critical accounts. Avoid using your potentially compromised phone for this.
Turn on two-factor authentication for all your accounts if you haven’t already. This adds an extra layer of security.
Check your account activity and active sessions. Review your email and Google/Apple account settings for any unfamiliar devices or locations and sign out of them.
Update your operating system. Many hacks rely on exploiting unpatched vulnerabilities, so make sure your OS is up to date.
Consider backing up your data and performing a factory reset. This is the most effective way to remove persistent malware. Remember to back up important data first, as a factory reset will erase everything.
Contact your bank if you notice any unfamiliar charges. They can help you secure your accounts and investigate any fraudulent activity.

How do phones get compromised?

Phones are typically compromised through:

Malicious apps: These can be sideloaded from unofficial sources or disguised as legitimate apps.
Phishing links: Clicking on suspicious links in emails or messages can lead to malware installation.
Physical access: Someone with direct access to your phone can install stalkerware or other malicious software.

Sticking to official app stores, avoiding unexpected links, and keeping your OS updated can prevent the majority of compromises.

Frequently Asked Questions

Can someone hack my phone just by calling me?

For most users, no. A standard phone call cannot install malware or compromise your device. The real risks come from the links you click, the apps you install, and reused passwords.

Do I need a phone “antivirus” app?

Generally, iPhones don’t require antivirus apps, and modern Android devices come with Google Play Protect built in. Good security habits are more important than adding another app. Be cautious of antivirus apps that may themselves be intrusive or track your activity.

What is stalkerware?

Stalkerware refers to hidden apps installed by someone with physical access to your phone to monitor your activities. A factory reset will remove it. If you suspect stalkerware, seek support before confronting the person, as they may become aggressive.

How can I protect my phone from being compromised?

Use strong, unique passwords, enable two-factor authentication, avoid clicking on suspicious links, and only download apps from official stores. Regularly update your OS and apps to patch vulnerabilities.

What should I do if I think my phone has been hacked?

Follow the steps outlined earlier: remove suspicious apps, change passwords, enable two-factor authentication, check account activity, update your OS, and consider a factory reset if necessary. Contact your bank if you notice any unauthorized charges.

Signs your phone might be compromised (and what to do)