Signs Your Phone Was Hacked and What to Do About It (2026 Update)

The myth that phones can't be hacked is just that, a myth. There is simply not a device that can't be hacked. Android or iOS, nothing is safe anymore. Let's first talk about how a phone can get hacked. Then let's look at some signs that your phone might be hacked, what to do if you think your phone was hacked, and how to protect your phone. We've also added the newest phone threats to watch for in 2026.

Key Takeaways

• Fast battery drain, overheating, apps you didn't install and strange calls or texts are classic signs of a hacked phone.
• In 2026, scam texts (smishing), AI voice-clone calls and SIM swaps are among the biggest phone threats.
• Suddenly losing cell service, or getting security codes you didn't request, can mean someone is trying to take over your phone number.
• Keep your phone updated, restart it regularly, use an authenticator app instead of text codes, and add a PIN to your cell carrier account.

So how can your phone get hacked?

By physical possession. If someone gets possession of your phone, they can install spyware on it in minutes. Some of these programs were designed as legitimate programs for parents to monitor their children's phone activities or whereabouts, or for employers to monitor the location and usage of company-owned phones. Some programs are just designed to steal your information. Either way, if someone is installing them on your phone without your knowledge, this is malicious and they have access to everything on your phone, including your location at all times.

Public Wi-Fi or public charging ports. Unprotected free Wi-Fi can expose your internet traffic to anyone who has access to that network. So if you are browsing, entering passwords, or buying online and someone is watching, they have all of that information. Hackers have also tampered with public charging ports so they can pull data from a phone while it charges. For more on this, check out our page: https://cloud-cover.me/hollis-blog/summer-travel-tips-for-cybersecurity-safety

SMS phishing. Becoming a hacker's favorite tactic because it is easy, cheap and it works. You get a text with a link or an attachment, you click on it, and you either land on a fake site that steals your login or payment information, or you download malware that gives the hacker access to your phone.

What's new in 2026: phone threats to watch

Phone scams have changed a lot in the last couple of years. These are the ones we're seeing most often right now.

1. Fake toll, DMV and delivery texts

Scam texts that look like they come from a toll road, the DMV, a delivery company or another government office have exploded. They usually say you owe a small fee and need to pay today to avoid a penalty. The FBI has warned the public about these texts more than once, and it reminds people that government agencies don't ask for payment by text.

One trick to watch for: the text tells you to copy and paste the link into your browser, or to reply "Y" so the link becomes clickable. That's how scammers get around the built-in protections on your phone. If a text asks you to do that, it's a scam.

2. AI voice-clone and deepfake calls

Scammers can now copy someone's voice from just a short clip on social media. They use it to call pretending to be a family member in trouble, your boss asking for an urgent payment, or even a government agency. The FBI's 2025 Internet Crime Report counted nearly $900 million in losses tied to AI-powered scams, and that's only what people reported.

If a call feels urgent and involves money, gift cards or passwords, hang up and call the person back on a number you already know. Many families and businesses now use a simple "safe word" that a real caller would know.

3. SIM swaps and eSIM takeovers

In a SIM swap, a scammer convinces your cell carrier, or breaks into your online carrier account, to move your phone number to a SIM or eSIM they control. Once they have your number, they get your text messages, including the security codes that protect your email, bank and other accounts.

The biggest warning sign is your phone suddenly showing "No Service" or "SOS only" in a place where it normally works. If that happens, call your carrier right away from another phone.

4. Fake apps and "update" pop-ups

Malicious apps still slip into app stores, and fake "your phone is infected" or "update required" pop-ups try to get you to install something. On Android especially, malware often asks for Accessibility permissions so it can read your screen and take over the phone. Only install apps from the official App Store or Google Play, check the reviews and developer name, and be suspicious of any app that asks for far more permissions than it needs.

5. QR code scams

Fake QR codes stuck on parking meters, flyers or even emails can send you to a phishing site that looks real. Before you enter any payment or login information after scanning a code, check the web address carefully. When you can, type the website in yourself or use the official app instead.

Signs that your phone has been hacked

New apps show up on your phone that you didn't install yourself. Sometimes manufacturers install apps with updates, so before you panic, search for the app to see if it's legitimate. If you don't find positive results, delete the app immediately. Chances are it was installed by a hacker and contains malware.

Apps aren't working like they used to, running slower or starting to glitch or shut down while you're using them. This could be a sign that malware or a virus is affecting legitimate apps.

Your battery starts draining very quickly, very suddenly. This can happen when an unknown, malicious app is running on your phone. These apps can run in the background, so you don't even have to open them, but they still use your phone's battery.

Your phone starts getting hot for no reason. It's not in the sun, you don't have a ton of apps open, and you haven't been on a call for 2 hours. If your phone gets really warm when it shouldn't, this could be another sign of malware making your phone work too hard and causing it to overheat.

Your phone reboots itself, switches off, dials numbers or starts apps on its own. It's not a phone ghost, it's more likely a hacker.

You start seeing international calls in your call log you didn't make. There are hackers who use your phone to make international calls or sell the service to others so they can make international calls without paying for them.

If emails that you send from your phone are being blocked by spam filters, it could mean that someone took over your email and is sending emails through an outside third-party server.

New for 2026:

• Your phone suddenly shows "No Service" or "SOS only" where it normally has signal. This can be a sign of a SIM swap.
• You get security codes or password reset texts and emails you didn't ask for. Someone may be trying to get into your accounts.
• You get alerts that your Apple ID, Google account or email was signed in on a new device you don't recognize.
• Friends tell you they're getting strange texts or messages "from you."

What do you do if you think your phone has been hacked?

Install a mobile anti-malware app such as Malwarebytes for iOS or Bitdefender for Android.

Delete any apps that you didn't install or don't recognize. If any apps in your data settings are using a ton of data while you're not even using them, delete them unless you are positive they are legitimate.

Update your phone's operating system and all of your apps. Updates close the security holes that hackers use.

Check which devices are signed in to your Apple ID or Google account and remove any you don't recognize.

If you lost service suddenly, call your cell carrier from another phone and ask them to lock your account and check for any SIM or eSIM changes.

You can run a full factory reset on your phone if you really think you have been hacked. And of course, change all of your passwords. But not from your phone. Log in to your accounts from your PC or laptop and change them from there.

If you lost money or think you were targeted by a scam, report it to the FBI at ic3.gov. Be careful: scammers are now pretending to be the FBI's complaint center too. The real FBI will never call you demanding money.

How to protect your phone

Never open a link if you can't see the full URL, and if you're not sure it's legitimate, don't open it.

Don't use public Wi-Fi or public charging ports. If you have to use public Wi-Fi, use one that is password protected and ask the business owner for the password. Don't do anything that exposes sensitive data while using it. Turn off the setting that allows your phone to automatically connect to public Wi-Fi. If you must charge your phone in public, use an outlet and your own charger.

Don't use the remember-password function on your phone. Use a password manager instead.

And of course, protect your phone with a strong passcode.

New for 2026:

• Turn on automatic updates for your phone and apps, and install them as soon as they arrive.
• Restart your phone at least once a week. The NSA recommends this because a restart can clear out some types of malware that live only in memory.
• Use an authenticator app or passkeys instead of text message codes wherever you can. Text codes can be stolen in a SIM swap.
• Add a PIN or passcode to your cell carrier account and ask your carrier to turn on number lock or port-out protection.
• Agree on a family or office "safe word" to verify urgent calls asking for money or information.
• If you're a high-risk target, such as an executive or someone who handles payments, iPhone's Lockdown Mode adds extra protection against advanced spyware.

Protecting company phones

If your employees use their phones for work email, Teams or company files, a hacked phone can quickly become a hacked business. Cloud Cover helps Ohio businesses secure company and personal devices with Microsoft Intune device management and trains teams to spot scam texts and calls with phishing testing and training. Want to know what that costs? Use our instant managed IT pricing calculator.