The MiFi doesn't only have an on/off button: it also has an internal webserver that you use to configure it. But it comes securely preconfigured, so most peopl

The MiFi doesn't only have an on/off button: it also has an internal webserver that you use to configure it. But it comes securely preconfigured, so most people can ignore the webserver --- easy, since it's invisible unless you go looking for it --- without suffering any ill effects. It's an example of progressive disclosure, I suppose.