Phone number cloning is more common than it seems
If your phone suddenly lost signal or you stopped receiving calls and SMS, it may be a sign that your number was cloned.
This type of attack, known as SIM swap, allows someone else to receive your verification codes.
With this, attackers can access:
- • Banking apps
1. Contact your mobile carrier immediately
This is the most important step.
Inform them that your line may have been cloned and request an immediate SIM card block.
Then, ask to reactivate your number on a new SIM card.
2. Recover your main accounts
After recovering your number, start changing passwords immediately.
Prioritize:
- • Main email account
- • Banking apps
These accounts are the most commonly used for account recovery.
3. Enable two-factor authentication
Whenever possible, enable two-factor authentication (2FA).
Prefer authenticator apps instead of SMS, since SMS messages can be intercepted.
4. Check for suspicious access
Review recent activity on your accounts.
Look for:
- • Unknown logins
- • Password changes
- • Changed email addresses
- • Connected devices
Disconnect anything that seems suspicious.
5. Warn your contacts
In many cases, criminals use cloned numbers to apply scams.
Warn friends and family to ignore suspicious messages.
How to prevent this from happening again
The best defense is reducing your dependence on SMS for security.
Use a password manager to create unique and secure credentials.
iSenhas helps protect your accounts with:
- • AES-256 GCM encryption
- • Strong password generator
- • Two-factor authentication code generator
- • Data breach monitoring
- • Security alerts
- • Public source code for security audits
Conclusion
Having your phone number cloned can give attackers direct access to your accounts.
Acting quickly is essential to avoid greater damage.
The more you rely on strong passwords and secure authentication, the lower the impact of this type of attack will be.
