Protect Your Canadian Phone Number From SIM-Swap Fraud
Matthew Leo · Published September 29, 2026 · Guides
If your phone suddenly loses cellular service, the problem may be more than a network outage. A criminal who moves your number to another SIM or carrier can receive calls and texted sign-in codes meant for you. You can lower that risk before anything happens, and the most useful protections are tied to your carrier account, not to a setting on the phone.
Ask your carrier about account and port protection
Start with the provider you pay for mobile service. Sign in through its official app or website, or call the number on your bill. Ask whether it can add extra verification for a SIM replacement, eSIM change and transfer of your number to another carrier. Ask specifically whether a port-protection feature, account PIN or SIM-change lock is available for your plan, and how you would remove it when you legitimately switch phones or providers. Availability and names vary, so don't assume a feature advertised by another carrier applies to your account.
The Canadian Centre for Cyber Security recommends additional provider verification and port protection or a SIM lock where offered. It also warns that criminals may use stolen account passwords or personal details to impersonate you. Give the carrier account its own strong password and secure the email account used to recover it. A PIN that merely unlocks the physical SIM in your phone is different from an account-level check on number transfers; ask your provider which one it offers.
Treat a transfer text as an alert
A legitimate switch to a new carrier usually needs confirmation from the number being moved. For example, Rogers says it texts a wireless customer when a port request arrives and asks for a YES or NO reply within 90 minutes. Its instructions say an unanswered request is cancelled. Other providers' wording and timing may differ.
If you did not request a transfer, don't approve it. Contact your existing provider through its official channel right away; don't use a phone number or link supplied in an unexpected message without checking it independently. A fraudulent SIM replacement within the same provider may follow a different process, so a transfer text is useful protection but not a complete defence.
Move important accounts away from SMS codes
Check the sign-in and recovery settings for your primary email, bank and other sensitive accounts. Where an account supports a passkey, authenticator app or security key, use one instead of SMS as the main second factor. Keep recovery codes or a spare security key in a safe place before removing SMS, and test that you can still sign in. Our passkey setup and recovery guide covers that preparation.
This change reduces reliance on your number. It does not guarantee that an attacker cannot access an account through password resets, support channels or a compromised email inbox. Review each service's recovery options, especially when it still uses your phone number as a fallback.
If your number stops working
First rule out an ordinary outage or device problem if you can, but do not wait for hours if your phone also stops receiving calls or verification texts. Use Wi-Fi, another phone or a carrier store to contact your provider and ask whether a SIM replacement or port was requested. Ask the provider to reverse an unauthorized change and secure the account. The Cyber Centre notes that Wi-Fi may continue working after a SIM swap, which can hide the loss of cellular service.
Next, secure the email account tied to your mobile service and financial accounts. Change passwords from a trusted device, revoke sessions where the service allows it and check for new recovery methods you did not add. Tell your bank and card providers if a sign-in or transaction may have been affected. Rogers' response guidance also points victims to the Canadian Anti-Fraud Centre and the credit bureaus. Record the time service failed, any transfer messages and the case number the carrier gives you.
When you intentionally move your own service, keep the old line active until the transfer is done and you have tested calls, texts and data. Our Canadian eSIM transfer guide covers that handoff. Account protection should make an unauthorized move harder without locking you out of a legitimate one.
Tags: SIM swap, phone security, Canadian carriers, fraud, Guide