Hackers get your phone number through data breaches, social engineering (phishing/vishing), public records, social media, data brokers, and even stolen mail, often selling it on the dark web to be used in more sophisticated SIM swapping or account takeover scams. They trick you into revealing it via fake texts/emails or find it on public profiles and sell it to other criminals, who then target you for fraud, says Aura and Proton.
“SIM swaps” that steal your phone number.
Fraudsters don't need to steal your phone to get access to your phone number. They can contact your phone provider and convince them to “swap” your phone number to a new SIM card — giving the scammers full access to your phone number.
Unfamiliar apps, losing access to your accounts, call and messaging features that suddenly stop working, and performance issues — such as apps crashing, a hot or loud device, and reduced battery life — are all common signs that your phone has been hacked.
Does Turning Your Phone Off Stop Hackers? For most people, yes. Everyday malware and common scams can't touch a device once the operating system shuts down. That's why rebooting often clears suspicious behavior; it kills anything living in memory.
How do scammers get my phone number? Scammers obtain your information in many ways. For example, they can get your phone number through data breaches, social engineering, online scams, and stolen mail.
Follow these steps to remove a hacker from your phone number: Download antivirus software. Run a virus scan to quarantine and delete any malware. Back up your data.
Scammers who know your phone number can text or call you, share your number publicly, or sell it on the dark web. If they have access to your SIM alongside other personal information, like your email or passwords, they could transfer your phone number to their device and commit identity theft.
Can I run a test to see if my phone is hacked? Yes, running an antivirus scan using a mobile security app like Norton 360 Deluxe can help you identify malware infections that could be granting hackers access to your device or data.
Why do Android phones turn up in breach headlines so often? Android powers most of the world's phones and many run outdated software, so attackers get more mileage for their effort. iPhones see fewer hits overall but attract highly skilled spyware crews.
Lock Your Phone
Set your phone to lock when you're not using it and create a PIN or passcode to unlock it. Use at least a 6-digit passcode. You also might be able to unlock your phone with your fingerprint, your retina, or your face.
Dial codes like *#21# or *#62# help check call forwarding settings, but they can't confirm if your phone is hacked. They're useful for spotting suspicious redirections, but use trusted antivirus apps for reliable threat detection.
Yes, a scammer can potentially access your bank account with just your phone number, primarily through a SIM swap scam, where they trick your mobile provider into transferring your number to their SIM, letting them intercept 2FA codes, or by using your number for phishing/social engineering to get more info and bypass bank security. While having only the number isn't usually enough for direct access due to bank security, it's a powerful tool for identity theft and account takeover, especially when combined with other stolen info.
Secure Your Accounts: Upon learning you've been hacked, immediately change passwords for all your online accounts. Start with those associated with sensitive information such as banking, email, and investments. From there, move on to accounts that contain less sensitive information such as social media and e-commerce.
With just your number, a cybercriminal could try and scam you or your loved ones, sell it on the dark web, or dupe you into disclosing more info. Then, combined with other data like your name, email, and birthday, they could attempt to hack your personal accounts or commit identity theft.
What Can Scammers Do With Your Phone Number? If you've experienced identity theft — or had your phone stolen — you should probably change your phone number. It's a massive inconvenience, but the pros will outweigh the cons.
10 signs your phone is hacked
Start by deleting unknown apps, updating your software, and running a security scan. Change passwords to any affected accounts and turn on 2FA. If you believe your phone has been hacked, start by removing any suspicious apps, updating your phone, and getting access back to any hacked accounts.
In some cases, hackers use scareware and phishing tactics to install illegitimate apps that contain spyware on people's phones. Then, the spyware runs in the background, allowing the hacker to continuously monitor and record the user's activity, including everything they type.
Dial *#21# to check if your phone is tapped.
Dial *#21# on your iPhone to check if a third party is intercepting your calls, messages, or data. This is another useful code to know if someone is monitoring your calls. This code reveals if voice, data, SMS, and other services are forwarded to another number.
For iOS, use Apple's Safety Check: To check if your iPhone has been hacked, go to Settings > Privacy & Security > Safety Check. This tool helps you review and revoke the access you've granted to people, apps, and devices, which is a common way iPhones are compromised.
An orange or green dot at the top of your phone's screen means an app is using your microphone or camera. If you're not actively using either, and have closed any apps that might have permissions to use them, it could be a sign that someone else activated them with remote-access tools and is monitoring your activity.
You can register your numbers on the National Do Not Call Registry at no cost by calling 1-888-382-1222 (voice) or 1-866-290-4236 (TTY). You must call from the phone number you wish to register. You can also register at donotcall.gov.
Remember, only internet data is encrypted.
Anything not using a cellular or Wi-Fi connection does not travel the internet. As a result, your VPN will not encrypt your standard voice calls or texts.
Ignore calls from 3-digit international area codes that are likely to be scams, including 232, 268, 284, 473, 664, 649, 767, 809, 829, 849, and 876. Be wary of calls from unknown numbers with your own area code. These may be international caller ID spoof scams that appear local.