A scammer can't get full control of your phone with just your number, but they can use it as a powerful tool for SIM swapping, phishing, and tricking you into giving up access, potentially compromising your bank, email, and social media accounts by intercepting 2FA codes or resetting passwords. While they can't usually install malware or control your camera remotely with only the number, it's a critical first step in serious attacks, making it vital to protect your number and online accounts.
Hackers and scammers can use your phone number as a “digital master key” to gain access to your online accounts (including your bank account, email, and social media) and target you and your contacts with phone and text scams. By far, the most dangerous risk posed by someone having your phone number is a SIM swap.
If you accidentally gave your phone number to a scammer, inform your mobile service provider to secure your account and monitor for suspicious activity. Watch out for unusual calls or messages, and consider changing your linked passwords.
Hackers can use a number of methods to hack your phone or online accounts — from malicious links in phishing messages and dangerous apps in third-party app stores, to hacking public Wi-Fi networks or taking over your phone number through a SIM swapping scam.
Report scam activity to your telco and Scamwatch. Contact your bank immediately if you notice unusual activity or if a scammer gets your money or information. Contact IDCARE (call 1800 595 160) if you've had personal details stolen.
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.
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.
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.
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.
Yes, but it's not easy for someone to hack your phone just by having your number. Most of the time, hackers use your number as part of a bigger plan. They might send you sneaky texts to trick you, track your whereabouts, send harmful links, or even intercept 2FA messages with spyware.
If a scammer is using your phone number, you should contact your mobile carrier to reclaim it, and then secure your linked accounts. In most cases, changing your phone number isn't necessary, but some people may take this step if they're relentlessly targeted by scammers.
To scare a scammer, you could waste their time with silly responses, pretend to be an automated messenger, or resend them the messages they sent you. Report all text scams to the Federal Trade Commission's Report Fraud site, filter messages from unknown numbers, and avoid opting in on company sites.
8 signs your phone is hacked
If scammers have access to your phone number, they could potentially use it to hack into your online accounts — including your email, social media, and even your bank account.
Identity crime explained
For example, identity fraud can result in someone using your identity to: steal money from your bank account. take out loans or credit cards in your name. take out phone plans and other contracts.
Contact your carrier: ask your mobile service provider if any other numbers or SIM cards are registered under your ID that you did not authorize; Credit monitoring: use credit monitoring services to watch for new accounts or services being opened in your name. This could indicate unauthorized use of your phone number.
Here are a few indications you've been hacked:
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.
What Else To Do if Your Phone Has Been Hacked
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.
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.
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.
Dialing *77 on your phone activates Anonymous Call Rejection, blocking incoming calls from private or blocked numbers, making anonymous callers hear a message to hang up and try again. It's a landline/VoIP feature (like AT&T, CenturyLink) to stop spam/prank calls but can sometimes vary by carrier or state, potentially connecting to emergency services (like *87 to turn it off).
It's much better to block spam calls and report them as spam rather than just deleting them, as blocking prevents future calls from that number and trains your carrier's filters, while deleting or declining just confirms your number is active, making you a target for more calls. Deleting or declining shows scammers your number is a valid, active mobile line, increasing your risk for more calls and potential fraud, so use built-in phone features, carrier services, or third-party apps to block unknown callers and mark spam.
For illegal scam calls, pressing 9 can actually increase the number of calls you receive. The safest way to stop telemarketing calls legally is by leveraging your legal rights. Register on the National Do Not Call Registry and understand the TCPA and state-specific rules.