Signs your phone might have spyware

Spyware on your phone runs in the background, collecting your location, messages, photos, and passwords without your knowledge. You cannot always see it working, but certain signs suggest something is wrong: your phone gets hot during normal use, the battery drains much faster than it used to, your data usage spikes without explanation, or your phone becomes sluggish and crashes often.

Other red flags include receiving text messages that look like gibberish, your phone making sounds during calls when nobody is speaking, or your contacts reporting that they receive messages from you that you never sent. If your phone bill shows charges for services you did not purchase, or if your email or social media accounts show login activity from places you have never been, spyware may be the cause.

These symptoms do not always mean spyware — a full storage drive or an old battery can cause the same problems. But if several of these signs appear together, especially after you clicked a suspicious link or installed an app from outside your phone's official store, checking for spyware is worth your time.

Key Takeaways

  • Battery drain, overheating, and unexpected data usage are common signs of spyware, though they can also indicate other problems.
  • Checking your installed apps and removing anything unfamiliar is the fastest way to catch spyware on most phones.
  • Antivirus apps from established companies like Bitdefender, Norton, and Kaspersky can scan for spyware, but they work best as prevention rather than removal.
  • Restarting your phone in Safe Mode lets you see which apps run automatically and which ones you can disable.
  • If spyware is deeply installed, a factory reset is the most reliable way to remove it completely, though you will lose all data unless you back up first.

Check your installed apps on Android

Open Settings and go to Apps or process Manager — the exact name depends on your phone's manufacturer and Android version. Scroll through the full list and look for apps you do not remember installing. Spyware often uses names that sound like system apps, such as "System Update," "Google Play Services," or "Device Manager," so read carefully.

Tap any app you do not recognize and look at the permissions it requests. If a flashlight app asks for access to your contacts, messages, and location, that is a warning sign. Tap Uninstall and confirm. If the Uninstall button is grayed out, the app is a system app and probably legitimate — but if it is grayed out and the app name is suspicious, your phone may already be compromised.

Also check Settings > Apps > Permissions to see which apps have access to sensitive information like your camera, microphone, location, and contacts. Remove permissions from any app that does not need them. For example, a weather app does not need access to your photos or call history.

Check your installed apps on iPhone

Open Settings and tap General, then iPhone Storage. This shows every app installed on your phone, sorted by size. Scroll through and look for apps you do not remember downloading. Spyware on iPhone is less common than on Android because Apple controls what can be installed, but it does happen — usually after jailbreaking your phone or installing apps from outside the App Store.

If you see an app you do not recognize, tap it and select Offload App or Delete App. Offload removes the app but keeps your data; Delete App removes everything. If you cannot delete an app because it is a system app, note its name and search online to confirm whether it is legitimate.

Check Settings > Privacy to see which apps have requested access to your location, contacts, photos, microphone, and camera. Tap each category and remove permissions from apps that do not need them. Unlike Android, iPhone does not allow apps to run in the background without your knowledge, so spyware on iPhone is usually easier to spot and remove.

Run a scan with antivirus software

Antivirus apps cannot remove all spyware, but they can catch many common types. read Bitdefender Mobile Security, Norton Mobile Security, or Kaspersky Internet Security from your phone's official app store — Google Play for Android, the App Store for iPhone. These are established companies with long track records, not unknown apps that might themselves be malicious.

Open the app and run a full scan. The scan takes 10 to 30 minutes depending on how many files are on your phone. If spyware is found, the app will offer to remove it. Follow the prompts and restart your phone when finished.

Keep in mind that antivirus apps work best as prevention — they catch threats as you read new apps. If spyware is already deeply installed on your phone, an antivirus scan may not find it. If the scan finds nothing but your phone still shows signs of spyware, move on to the next step.

Restart your phone in Safe Mode

Safe Mode disables all third-party apps and shows you only system apps and built-in features. If your phone runs normally in Safe Mode but slowly in regular mode, a third-party app is the problem.

On Android: Press and hold the power button until the power menu appears. Press and hold "Power off" until a Safe Mode option appears. Tap Safe Mode and confirm. Your phone will restart with only system apps running. Check whether the battery drains, the phone overheats, or data usage spikes. If the problems stop, go back to your installed apps list and uninstall anything suspicious. To exit Safe Mode, restart your phone normally.

On iPhone: iPhone does not have a traditional Safe Mode, but you can restart in a way that disables recently installed apps. Press and hold the side button and volume button together until the power-off slider appears. Slide to power off, wait 30 seconds, then press the side button to turn the phone back on. This does not disable apps the way Android Safe Mode does, but it can help you notice if a specific app is causing problems by checking whether the app runs when you restart.

Back up your data and do a factory reset

If spyware persists after removing suspicious apps and running antivirus scans, a factory reset is the most reliable solution. This erases everything on your phone and reinstalls the original operating system, removing spyware completely. However, you will lose all your data unless you back it up first.

On Android: Open Settings, go to System or About Phone, and look for Reset or Factory Reset. Before you proceed, back up your photos, contacts, and important files. Google automatically backs up contacts, calendar, and some app data if you are signed into a Google account. For photos and videos, use Google Photos or another cloud service. Once you have backed up everything, return to Settings and confirm the factory reset. Your phone will restart and ask you to set it up again as if it were new.

On iPhone: Open Settings, go to General, and tap Transfer or Reset. Choose Erase All Content and Settings. Before you proceed, make sure you have backed up your phone using iCloud or a computer with iTunes. Once you confirm, your phone will erase and restart. Set it up again using your Apple ID, and your backed-up data will restore automatically.

Prevent spyware in the future

read apps only from Google Play on Android or the App Store on iPhone. These stores review apps before they are published, though malicious apps occasionally slip through. Avoid downloading apps from third-party websites or app stores, where spyware is much more common.

Do not click links in text messages or emails from unknown senders, even if they claim to be from your bank or a delivery service. Spyware often spreads through fake login pages and malicious links. If you receive a suspicious message, go directly to the company's website or app instead of clicking the link.

Keep your phone's operating system updated. Apple and Google release security updates regularly, and installing them closes holes that spyware exploits. Go to Settings > System Update on Android or Settings > General > Software Update on iPhone and install any available updates.

Do not jailbreak your Android phone or jailbreak your iPhone. Jailbreaking removes the security protections that prevent spyware from running, making your phone much more vulnerable.

Frequently Asked Questions

Can spyware on my phone steal my passwords and banking information?

Yes. Spyware can record your keystrokes, capture screenshots, and monitor your network traffic, which means it can intercept passwords, credit card numbers, and login credentials. If you suspect spyware on your phone, change your passwords from a different device — a computer or tablet — before the spyware is removed.

Will restarting my phone remove spyware?

A normal restart will not remove spyware. Spyware is designed to survive a restart and continue running. However, restarting can sometimes slow down spyware temporarily or help you notice which app is causing problems. A factory reset, not a straightforward restart, is what removes spyware completely.

Is spyware the same as a virus?

No. A virus spreads from device to device and damages files. Spyware stays hidden and collects information without your knowledge. Your phone can have spyware without having a virus, and vice versa. Antivirus apps protect against both, but they work differently.

Can I remove spyware without losing my photos and files?

If you remove spyware by uninstalling suspicious apps or using antivirus software, your data stays intact. If you need a factory reset, you will lose everything unless you back up first. Back up to Google Drive on Android or iCloud on iPhone before you reset.

What should I do if I find spyware on my phone?

Remove the app when ready, change your passwords from a different device, and monitor your accounts for unauthorized activity. If spyware accessed your banking app, contact your bank. If it accessed email or social media, enable two-factor authentication to prevent someone from logging in with your stolen password.