Setting up Proxy IOS Devices(iPhone/iPad/iPod)
The First Thing you'll want to do is to go the Settings Application.
Next you'll want to press the Wi-Networks Option.
Click on the connection you want to use the proxy with. You'll have to press on the blue arrow next to the conenction name. Doing this will bring you to the advanced network settings menu.
The Next Step is to Change the HTTP proxy setting to Manual. This way you can enter in a proxy of your own.
To Find what to put inside the server and port fields here I suggest Checking out these URls.
A quick search of ip port proxy should also give more options.
Also if it is not clear server is where you would put the long number separated by dots.
Hope this guide is helpful.