Some international Telecommunications Networks will block any SMS messages containing security codes due to their Security Policies.
This means your bank may send the SMS to your number with the security code but the receiving network will block the SMS and it will not be sent to your handset.
We recommend you contact your financial institution and request a token service.
A security token app is an application on your phone that generates a One Time Security Code, entered when you make a transaction through the internet or when mobile banking.
Security tokens apps are available to download onto most mobile phones for most Australian Financial Institutions.