Determine whether iPhone is really connected to the internet or just behind a restricted hotspot

Question

I\'m having quite a lot of trouble on identifying rigorously the kind of network access an iPhone has. I have seen many questions like this one on StackOverflow but none of

Answer 1

The simplest method to check outbound connectivity is to GET Google's generate204 page and check the response code

http://www.google.com/generate_204

Or you can use

http://www.apple.com/library/test/success.html which is the page the OS uses