How to tell if someone is accessing your Samsung Phone?

You can tell if someone has been on your Samsung phone by looking for unfamiliar apps, unexpected battery drain, strange account activity, or changes to your settings. These signs often point to unauthorised access, whether physical or through a suspicious app. Below, we walk through exactly what to look for and what to do about it.

What are the signs that someone has been on your Samsung phone?

The most common signs that someone has accessed your Samsung phone include apps you do not recognise, settings that have been changed without your knowledge, unusual battery drain, and data usage that seems higher than normal. Your phone may also feel warm when idle, or you may notice messages or calls you did not make.

Here is a fuller list of warning signs to watch for:

Unfamiliar apps installed: If you spot apps you never downloaded, someone may have installed them while using your phone.
Changed settings: A screen lock removed, Bluetooth switched on, or mobile data turned on unexpectedly are all red flags.
Battery draining faster than usual: Background apps running without your knowledge can eat through your battery.
Higher data usage: Go to Settings, then Connections, then Data Usage to check if an app is consuming data in the background.
Calls, texts, or emails you did not send: Check your sent folder and call log for any activity you do not recognise.
Phone feels warm when not in use: This can suggest something is running in the background that should not be.

None of these signs alone is definitive proof, but if you notice several of them together, it is worth investigating further.

Can you see who has accessed your Samsung phone recently?

Samsung does not have a built-in log that shows exactly who picked up your phone, but you can piece together recent activity using several built-in tools. Checking your notification history, recent app usage, and Samsung account activity gives you a strong picture of what happened and when.

Check your notification history

Samsung's notification history feature keeps a record of recent alerts. To access it, press and hold an empty area of your home screen, tap Widgets, and search for Settings Shortcut. Alternatively, go to Settings, then Notifications, then Advanced Settings, and enable Notification History. Once switched on, you can scroll back through recent notifications to spot anything unusual.

Review recent app usage

Go to Settings, then Digital Wellbeing and Parental Controls, then Dashboard. Here you can see exactly which apps were opened and for how long, broken down by day. If an app was used at a time when you were not on your phone, that is a clear sign someone else was.

Check your Samsung account activity

Visit account.samsung.com and sign in to review your account activity, including recent sign-ins and connected devices. If you see a device or location you do not recognise, your account may have been accessed without your permission.

How do you check if an app is secretly watching or listening?

You can check which apps have access to your camera and microphone through Samsung's privacy settings. On your Samsung phone, go to Settings, then Privacy, then Permission Manager. From there, tap Camera or Microphone to see a full list of apps that have been granted access, and when they last used it.

Samsung's One UI also shows small indicator icons in the top right corner of your screen whenever an app is actively using your camera or microphone. A green dot means one of them is in use. If you see this when you are not actively using an app that needs it, something may be running in the background without your knowledge.

To tighten control over your privacy settings, go to Settings, then Privacy, and review Privacy Dashboard. The Privacy Dashboard gives you a 24-hour timeline of which apps accessed sensitive permissions like your location, camera, and microphone. This is one of the most useful tools Samsung provides for spotting suspicious app behaviour.

If an app has no good reason to access your camera or microphone, tap it and select Don't Allow to revoke its permission immediately.

What should you do if you think someone accessed your Samsung phone?

If you suspect someone has been on your Samsung phone, act quickly. Start by changing your lock screen PIN or password, then review your installed apps and remove anything unfamiliar. Check your accounts for unauthorised activity and revoke any app permissions that look suspicious.

Follow these steps in order:

Change your lock screen password immediately. Go to Settings, then Lock Screen, then Screen Lock Type, and set a new PIN, password, or pattern.
Check for unfamiliar apps. Go to Settings, then Apps, and scroll through the full list. Uninstall anything you do not recognise.
Review your Google and Samsung account activity. Look for sign-ins from unknown devices or locations and sign out of any sessions you do not recognise.
Change your email and key account passwords from a separate, trusted device.
Run a security check. Samsung's built-in Device Care tool includes a security scan. Go to Settings, then Device Care, then Device Protection, and tap Scan Phone.
Enable two-factor authentication on your Samsung account and any other accounts linked to your phone.

If you believe the access was malicious or you have found spyware, consider performing a factory reset as a last resort. Go to Settings, then General Management, then Reset, then Factory Data Reset. Back up your data first, and be aware that restoring from a backup could reintroduce the problem if the backup was made after the suspicious app was installed.

How do you stop someone from accessing your Samsung phone in the future?

The most effective way to prevent unauthorised access to your Samsung phone is to use a strong lock screen, keep your software updated, and regularly review your app permissions and privacy settings. A few simple habits go a long way towards keeping your phone secure.

Strengthen your lock screen

Go to Settings, then Lock Screen, and choose a strong PIN of at least six digits, a complex password, or use biometrics like your fingerprint or face recognition. Avoid simple patterns or four-digit PINs that are easy to guess. You can also set your phone to lock automatically after a short period of inactivity.

Keep One UI and your apps updated

Samsung regularly releases security patches through One UI updates that fix vulnerabilities before they can be exploited. Go to Settings, then Software Update, and tap Download and Install to check for the latest update. Keeping your apps updated through the Galaxy Store is equally important, as outdated apps can be entry points for unwanted access.

Review permissions and use Secure Folder

Make it a habit to check your app permissions every few months through Settings, then Privacy, then Permission Manager. Remove any access that does not make sense for the app in question. If you store sensitive information on your phone, Samsung's Secure Folder feature creates a private, encrypted space that requires a separate password to open. You can find it under Settings, then Security and Privacy, then Secure Folder.

Staying on top of these privacy settings does not require technical knowledge. A few minutes of checking in regularly can make a real difference in keeping your personal information safe.

Frequently Asked Questions

Can someone access my Samsung phone remotely without physically touching it?

Yes, remote access is possible if someone has installed a stalkerware or remote access app on your device, or if your Samsung or Google account credentials have been compromised. Signs of remote access are similar to physical access — unusual battery drain, unexpected data usage, and app activity at odd times. Revoking suspicious app permissions, changing your account passwords, and enabling two-factor authentication are the most effective ways to cut off remote access.

Will a factory reset completely remove spyware from my Samsung phone?

In most cases, yes — a factory reset will wipe spyware and any other malicious software from your Samsung phone, since it erases all data and returns the device to its original state. However, be cautious when restoring from a backup, as restoring a backup made after the spyware was installed could reintroduce it. If possible, set your phone up as a new device and reinstall only the apps you trust individually.

Does Samsung's Secure Folder fully protect my files and apps from someone with physical access to my phone?

Secure Folder provides a strong layer of protection by creating an encrypted, separately locked space on your device — even if someone unlocks your main phone, they cannot access Secure Folder without its own PIN, pattern, password, or biometric. That said, it is not completely foolproof if your Secure Folder password is the same as your lock screen or if someone has access to your Samsung account credentials. Use a unique, strong password for Secure Folder and keep your Samsung account secured with two-factor authentication for the best protection.

How can I tell if a monitoring or parental control app has been secretly installed on my Samsung phone?

Monitoring apps are often designed to be hidden, but there are a few ways to detect them. Go to Settings, then Apps, and tap the three-dot menu to select ‘Show system apps' — this reveals all installed apps, including ones not visible on your home screen. You can also check Settings, then Battery, then Battery Usage to see if any unfamiliar app is consuming power in the background. If you find a suspicious app you cannot identify, search its package name online before uninstalling it to confirm what it does.

What is the safest way to back up my Samsung phone before performing a factory reset?

The safest approach is to back up only your essential data — contacts, photos, and documents — rather than a full system backup, since a full backup could carry over the very app or malware you are trying to remove. Use Samsung Cloud or Google One to back up contacts and photos selectively, and manually save important files to a computer or external drive. Avoid restoring app data or settings from the backup when setting up your phone again, as this is the most common way threats are accidentally reintroduced.

How often should I review my app permissions on my Samsung phone?

A good rule of thumb is to review your app permissions every one to three months, or immediately after installing new apps, noticing unusual phone behaviour, or after a relationship change where someone previously had access to your device. You can make this quicker by using the Privacy Dashboard in Settings, then Privacy, which gives you a 24-hour snapshot of which apps accessed sensitive permissions like your location, camera, and microphone. Removing permissions from apps you rarely use is one of the simplest and most effective privacy habits you can build.

Can changing my lock screen PIN prevent someone who already has access to my accounts from getting back in?

Changing your lock screen PIN secures physical access to your device, but it will not on its own stop someone who has your account credentials from accessing your data through another device or online. That is why it is essential to change your Samsung account, Google account, and email passwords at the same time — ideally from a separate trusted device — and to enable two-factor authentication on each. Think of the lock screen PIN and account security as two separate but equally important layers of protection.

Daniel van Dorp - CTO / Co-Founder / Blogger

[email protected]

First Samsung device: Galaxy S II

Daniel is the proud co-founder of SamMobile. He joined the SamMobile team in 2011. Most of his spare time is spent enjoying nature (and life in general) with his wife & dog, friends, and family.

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