How to Know If Your Phone Has Been Hacked: 11 Warning Signs

How to know if your phone has been hacked - 10 warning signs

Your phone has your bank app, your pictures, your text messages and your passwords. The thought of someone getting into it without you realizing is frightening. The positive part is that a stolen phone usually has some clues. You just need to understand what to watch for.

This guide talks about the signals that your phone might be hacked how to check for hacking on Android and iPhone and the specific steps to follow if your phone has been taken over.

What Does "Phone Hacked" Actually Mean?

A hacked phone usually means one of these things happened:

Someone installed spyware or malware on your phone by downloading a fake app or clicking a bad link.
Someone accessed one of your accounts (email, banking, social media) that is linked to your phone.
Someone performed a SIM swap moving your phone number onto another persons SIM card.
Someone connected your phone to a Wi‑Fi network or a bad charging cable to steal your phone data.

Android phones are targeted often than iPhones but no phone is completely safe. A 2025 report from mobile security firm Zimperium found that malware was present, on 18% of all devices it scanned so this is a common problem, not a rare one.

Signs Your Phone Has Been Hacked

Here are the most common warning signs, based on guidance from security companies like Norton, McAfee, and NordVPN, along with government cybersecurity resources.

1. Your Battery Drains Really Fast

If your battery is going down a lot faster than it used to and you are using your phone the way something is probably running in the background that is making this happen. This thing is likely to be malware, which keeps working when your screen is turned off and it uses up your power really quickly.

2. Your Phone Gets Too Hot, for No Reason

If your phone is getting hot when it is just sitting there and you are not playing games or charging it then maybe some app is using its brain without you knowing. This is an obvious sign that someone has gotten into your phone.

3. You See a Spike in Data Usage
Spyware often sends your data, like photos, messages, or location, to a remote server. This uses mobile data in the background. Check your data usage in your phone settings and look for apps using more data than they should.
4. Your Phone Feels Slow
A hacked phone can feel laggy or slow to respond. Apps may take longer to open, or the phone may freeze more than usual. This happens because malicious software is using memory and processing power in the background.

5. You See Apps On Your Phone That You Do Not Remember Getting
If you look at your phone and see apps on the home screen or in your list of apps and you have no idea where they came from that is a warning sign. This happens a lot, with Android phones because sometimes people can put apps on their phone without using the Play Store.

6. You Get A Lot Of Pop Ups On Your Phone

If you start seeing a lot of pop ups on your phone even when you are not using the internet that is probably because of software on your phone. This kind of software is called adware. It is meant to show you ads. You should never touch these pop ups because some of them can steal your information.

7. You See Calls, Texts or Emails That You Do Not Remember Sending

You should look at the list of calls you made and the messages you sent. If your friends tell you they received texts from you or if you notice calls, to phone numbers you don't recognize someone could be using your phone without you realizing it. You need to check your phone to see if someone is using it to make calls or send messages. Your phone is sending calls, texts or emails that you don't remember sending. That is a problem.

8. You Get Locked Out of Accounts
If you suddenly cannot log into your email or social media or if you receive reset password emails that you did not request this is a warning. It usually means that someone already has access to an account linked to your phone. I would be worried if I saw this happen to me because it shows that my phone and my accounts are already under someone’s control. It means that someone already has access, to an account linked to your phone and that you should act quickly.
9. Unexpected Charges on Your Phone Bill
Watch out for charges, from premium text services or subscriptions you did not sign up for. Hackers can use a phone that has been compromised to create bills. Always check your phone bill carefully. Look for any unknown charges. If you find something contact your carrier away. Stay alert. Keep your phone safe.
10. Websites Look Different or Broken
If websites you know and use suddenly look歪 or act strange it could be malware, at work. The malware might be redirecting your internet traffic through a server. That means someone else could be watching what you type, including your passwords. Always pay attention to how websites look and behave. If something feels off it might be a sign of a problem.

11. The Camera or Microphone Light Turns On By Itself
On phones that have a camera or microphone indicator light this happening when you are not using either is a warning. It could mean an app is using them without your permission.

How to Know If Your Android Phone Is Hacked

Along with the general signs above, Android users can do a few extra checks.

Go to Settings > Apps and look through the full list, not just your home screen, for apps you do not recognize.
Check Settings > Security (or Privacy) for any unknown device admin apps, since malware often asks for admin-level access to avoid being removed easily.
Dial #21# to check if call forwarding has been turned on without your knowledge. Dial #62# to see where calls go when your phone is unreachable.

Check battery usage under Settings > Battery to see which apps are using the most power.

How to Know If Your iPhone Is Hacked

iPhones are harder to hack because Apple controls the App Store closely. Hacking can still happen, especially if the iPhone was jailbroken.

Go to Settings > General > VPN & Device Management. If you see a configuration profile you did not install remove it because these can be used to control a device
Check Settings > Privacy & Security to review which apps have access to iPhone camera, microphone and location.
Look at Settings > Screen Time > See All Activity for apps iPhone does not recall using.
If iPhone feels unusually slow or hot, with use run through the general signs list above.

How to Check If Your Phone Is Hacked: A Simple Process

If you are asking is my phone hacked, follow these steps in order.

Take a look at the apps on your phone. Go through every app you have not just the ones on your home screen and get rid of anything that you do not know what it is.
You should also check what each app is allowed to do. See which apps can use your camera, microphone, location and messages. If an app does not need to use one of these things to work then you should take away its permission to do so.
Next you need to check your accounts. Look at your email and other important accounts to see if there are any warnings about someone logging in requests to reset your password or sign-ins from devices or places you do not know.
Then you should run a scan to check for software on your phone. Use an app that you trust to scan your phone for any known threats.

Finally take a look, at your phone bill. Check to see if there are any charges or messages that you did not okay.

Phone Hacked? What to Do Right Away

If you believe your phone has been hacked, act quickly.

Disconnect from the internet. Turn off Wi-Fi and mobile data to stop the attacker from sending or receiving data.
Do not enter information. Avoid typing passwords or banking details on the phone until it's secure.
Change your passwords from a device. Start with your email since it is often used to reset accounts.
Turn on two-factor authentication (Very Imp) (2FA). Use an authenticator app than SMS where possible since text messages can be intercepted.
Contact your bank if you notice any financial activity.
Report identity theft, to your countrys consumer protection body if money or personal data was stolen.

How to Remove a Hacker From Your Phone

Once you have taken the immediate steps above, focus on actually removing the threat.

Delete suspicious apps. Remove anything you did not knowingly install.
Run a full antivirus or anti-malware scan using a reputable security app from the official app store.
Update your operating system. Updates often fix the exact security holes that hackers use, so install any pending updates right away.
Remove unknown device profiles (iPhone) or admin app permissions (Android), as covered above.
Factory reset if the problem continues. This is the most reliable way to remove deep or hidden malware. Back up only your photos and documents first, not a full system backup, since a full backup can bring the malware back with it.

After a factory reset, set the phone up as new rather than restoring a complete backup, and reinstall apps carefully, only from the official app store.

How to Secure a Hacked Phone Going Forward

Once your phone is clean, lock things down so it does not happen again.

To keep your phone safe you should use a screen lock like a PIN or a password or a biometric lock. Do not use a pattern.
You need to keep your software updated. This means you have to update your operating system and all the apps on your phone.
It is an idea to turn on two-factor authentication on your email and your banking and social accounts.
When you are out you should be careful where you charge your phone. Some public charging stations can be bad they can transfer data through the USB cable.
You have to be careful when you use Wi-Fi. Do not log into your accounts when you are on an open network. If you use Wi-Fi a lot you should think about getting a VPN.

Only get apps from the app store. Do not get apps from stores because they can have bad things, like malware.

How to Protect Your Phone From Hackers

Good security is mostly about small habits, repeated consistently.

When you get a text or email with a link take a moment to think before you click on it. It might look like it is from someone you know. You should still be careful.
You should also check what an app can do when you install it. For example a flashlight app does not need to look at your contacts.
Every now and then go through the apps on your phone. Get rid of the ones you do not use anymore.
It is an idea to keep the automatic updates turned on for your phone and its apps.

You should use passwords, for different accounts. It is an idea to use a password manager to help you keep track of them.

FAQs

Can someone hack my phone by calling me? A regular phone call cannot hack your phone by itself. The danger usually happens when you click a link install an app or answer a call and then get tricked into sharing information or installing something.

Does a factory reset get rid of a hacker? In all situations yes. A factory reset clears the device, which takes away malware and spyware. Stay away from using a backup that was made when the phone was already stolen.

Can my phone be hacked through Wi-Fi? Yes joining fake public Wi-Fi networks is a way that bad people get your data or send malware to your device. Using a VPN helps that danger when you are on public networks.

Is an iPhone secure than Android when it comes to hacking? iPhones have malware attacks because Apple only allows apps, from its own App Store but iPhones can still be hacked, especially through phishing or if the device is jailbroken.

Final Word

When your phone gets hacked you usually see some warning signs. These signs can be things like your battery running out fast strange things happening with your data usage apps you do not know or alerts about your account that you did not ask for. If you see than one of these things happening at the same time you should take it very seriously. You should disconnect your phone from the internet run a security scan to check for problems change your passwords using a device and if the problem is still there you should reset your phone to its original settings.

Disclaimer: This article is for people who want to learn about phone hacking in general. It is not meant to replace the advice of a professional who knows a lot about cybersecurity. If you think someone has stolen information about your money or personal life you should contact your bank and the people in your country who are, in charge of helping consumers and dealing with cybercrime.