Can I check to see if my phone has been hacked?

Phone Hacked? Signs and Essential Security Steps

Suspicious battery drain and unexplained data consumption are clear warnings that your device faces security threats. Understanding the nature of these vulnerabilities is crucial for protecting your digital identity and personal information. Learn the necessary actions to secure your accounts and stop unauthorized access before your data becomes fully compromised. can I check to see if my phone has been hacked

Warning Signs Your Phone Might Be Compromised

If you are wondering, can I check to see if my phone has been hacked?, the answer is yes. You can check if your device is compromised by looking for specific warning signs like sudden battery drain, unexpected apps, unusual data spikes, and unauthorized verification codes. However, these symptoms could also relate to hardware aging or background app refreshes, so further investigation is required before assuming a breach.

Battery Drain and High Data Usage

Malware often runs continuously in the background, communicating with outside servers and consuming excessive power. I remember dealing with this personally when my normally reliable device started dying by noon. It turned out an unknown background app was silently eating through both my data plan and my battery life.

Across the industry, the volume of these threats is staggering, with over 14 million mobile malware and adware attacks blocked globally in 2025 alone.^[1] If you notice your phone dropping battery rapidly while sitting idle, or if your data usage spikes without a change in your browsing habits, it warrants immediate attention.

Suspicious Apps and Unwanted Actions

Look for newly installed or invisible apps, such as those with blank icons or generic names like Cleaner, that you do not remember downloading. Additionally, pay attention to unwanted verification codes, unusual outgoing calls, or texts sent to contacts without your permission.

In the first half of 2025, mobile attacks surged by 29%, showing how quickly these malicious installations can spread.^[2] Receiving unexpected SMS or email codes for accounts you didnt try to access is a massive red flag that someone is attempting to bypass your security.

How to Verify and Secure Your Device

Verifying a compromise involves checking logged-in devices, running a malware scan, and checking for call forwarding. Taking these diagnostic steps helps confirm whether the strange behavior is caused by a malicious actor or a simple system glitch.

Check Logged-In Devices

On an iPhone, you can open Settings, tap your Name, and scroll down to view all signed-in devices. Remove anything unrecognized immediately. For Android, open Settings, tap Google, navigate to Manage your Google Account, go to Security, and then Your devices to review and sign out of unfamiliar hardware.

Keeping track of active sessions prevents unauthorized access to your cloud data and personal files. It is also an excellent habit to audit this list monthly, ensuring that old devices you no longer use do not remain connected to your sensitive accounts.

Scan for Malware with Built-In Tools

You do not need to be highly technical to scan for spyware. On Android, open the Google Play Store, tap your profile icon, select Play Protect, and tap Scan. You can also install reputable antivirus apps like Bitdefender or Norton to detect how to check for spyware on phone.

For iPhone users, Apple’s built-in Safety Check (located under Settings > Privacy & Security) helps you easily stop sharing information and assess potential vulnerabilities without digging through complex system logs.

Check Call Forwarding

Dial #21on your phones keypad to see if your calls, data, or messages are being forwarded elsewhere. This is a common tactic attackers use to intercept two-factor authentication calls or text messages.

If you find suspicious forwarding active, dial #002to instantly disable all call forwarding. This quick code works across most major carriers and instantly cuts off an attackers ability to monitor your incoming communications.

Take Immediate Action if Hacked

If you find an unfamiliar or malicious app, uninstall it immediately and work to secure your accounts. Acting quickly limits the amount of data an attacker can extract from your smartphone.

Change Passwords and Enable Two-Factor Authentication

Change your account passwords immediately and turn on Two-Factor Authentication (2FA) for all critical accounts, starting with your primary email address and banking apps. Security measures like 2FA significantly reduce unauthorized access, yet surprisingly, 58% of small and medium businesses still remain unaware of the security benefits of multi-factor authentication. ^[3]

Using authenticator apps or physical security keys adds a critical layer of defense that passwords alone cannot provide. Never use your compromised phone to reset these passwords; always use a secondary, secure device like a trusted laptop.

Factory Reset as a Last Resort

If you are locked out of accounts or the phone acts entirely on its own, a factory reset is the safest way to completely clear the device. This process completely wipes the storage drive, taking any hidden malware or spyware with it.

Ensure you have backed up your essential photos and contacts before proceeding. However, be extremely cautious not to restore your apps from a backup made while the device was infected, as this will simply reinstall the malicious software you just worked so hard to remove.

Choosing a Mobile Security Approach

When securing your smartphone against potential threats, there are different methods available, each tailored for different threat levels and technical abilities.

Built-in OS Security (Play Protect / Safety Check)

1. Good for catching known malicious apps and running basic privacy audits without needing technical knowledge.
2. Extremely low impact on battery life and system performance.
3. Free and included natively with your device's operating system.

Third-Party Mobile Antivirus

1. Provides comprehensive scanning for advanced spyware, phishing links, and malicious network threats.
2. Can consume background battery and processing power due to constant monitoring.
3. Usually requires a paid subscription for premium active-scanning features.

Hardware Security Keys (⭐ Recommended for Accounts)

1. Provides the absolute highest level of phishing resistance for your online accounts, protecting data even if the phone is compromised.
2. Zero battery drain on the phone itself.
3. One-time purchase of physical hardware.

The Silent Battery Drain: Identifying Hidden Adware

David, a freelance designer, noticed his phone's battery dropping from 100% to 20% in just four hours, even though the device sat on his desk untouched. He also noticed occasional random pop-up ads when opening basic utilities like his calculator.

Assuming his battery was just getting old, he almost bought an expensive replacement. However, he checked his data usage settings and noticed an unnamed app with a blank icon had consumed over 5GB of background data in a single week.

Instead of paying for a hardware repair, David ran a scan using Google Play Protect, which identified a malicious "Cleaner" app he had downloaded months prior. He uninstalled the app immediately and restarted his device.

Within 24 hours, his battery life returned to normal, easily lasting a full day. He also enabled Two-Factor Authentication on his email and banking accounts as a precaution, preventing any unauthorized logins from the data that might have been compromised.