SIM swap fraud is a growing threat affecting both individuals and businesses. It happens when a fraudster takes control of your mobile number, allowing them to intercept calls, texts, and security codes — often without you realising until damage is done.
Understanding how it works is the first step in staying protected.
What is SIM swap fraud?
SIM swap fraud occurs when a criminal convinces a mobile provider to transfer your phone number to a new SIM card. Once successful, they can receive your calls and messages, including one-time passcodes used for banking, email, and business systems.
This type of fraud is often used to gain access to:
- Online banking and financial accounts
- Email and cloud services
- Business systems protected by SMS authentication
Common warning signs
You may be a victim of SIM swap fraud if you notice:
- Sudden loss of mobile signal
- Calls or texts not coming through
- Notifications about account changes you didn’t make
- Unusual activity on your bank or online accounts
If these happen, act immediately.
How fraudsters get your details
Criminals often gather information through:
- Phishing emails or text messages
- Fake phone calls posing as trusted companies
- Data leaks or overshared personal information online
With enough details, they can impersonate you and request a SIM change.
How to protect yourself
There are simple but effective steps you can take to reduce your risk:
- Add extra security to your mobile account, such as a PIN or password
- Be cautious with messages or calls asking for personal information
- Avoid sharing your mobile number publicly where possible
- Use app-based authentication instead of SMS for critical accounts
- Monitor your accounts regularly for unusual activity
For businesses, staff awareness and secure authentication processes are essential.
What to do if you suspect SIM swap fraud
If you think your number has been compromised:
- Contact your mobile provider immediately
- Secure your bank, email, and business accounts
- Change passwords and review recent activity
Quick action can significantly limit the impact.
Staying secure with the right support
At King Communications, we work closely with businesses across Ireland to help them understand mobile security risks and put the right protections in place. From secure connectivity to expert advice, staying informed is a key part of staying protected.
If you’d like guidance on safeguarding your mobile communications, our team is here to help.