Getting a proxy to work in iPhone?

I'v followed this instructions http://www.wikihow.com/Use-TOR-on-an-iPhone

to set a .pac file as proxy for the iPhone.

Everything seems ok.

I hosted the .pac in my computer and tested the url to the .pac file from iPhone's Safari, and it's found.

I used the .pac file in a stock firefox (not the one bundled with tor) and it works, showing a different external ip (Tor-ified)

But from the iPhone it does't work, and i just came across with this:

"Apple included support in iOS 6 for a single proxy to be used across the operating system, however, this feature isn’t available as a configurable option in the end-user interface. The feature is only available in environments where the device is configured as a “supervised” device using Apple Configurator, e.g. in an enterprise or educational environment."

Is that truth?

If it is, What is the proxy setting for, under each wifi network settings?

Is there any other way to setup a "supervised" device without "Configurator"? ( I don't have Lion OS), e.g. with iPhone configuration utility)