The "Hello Proximus" mobile application allows Proximus customers to easily check their Mobile Internet usage.
The application also contains 1 how-to guide:
Disable data connection: In standard configuration, your Windows Phone 7 is always connected to the Proximus 3G network, even in "stand-by" mode
UIS - The application is a security solution which facilitates authentication to web services and sites. The application incorporates an OATH compliant Time based HMAC One Time Password generator or TOTP