HELP iPhone 42 wont access internet

[Chakravartin]

Kate wrote:
And a question, my wifi works fine, its the 4g that doesn't, so why would I mess with the proxy settings in the wifi?

Safari cannot open the page.
"There was a problem communicating with the web proxy server (HTTP)"

Safari communicates with web servers via http.

Other protocols (POP/SMTP for email) seem to work. Http does not work. And the error message specifically notes an http proxy error.

So the first place to check is your phone's http proxy setting.

...And you didn't indicate that the problem involved the 4G data setting.

...

If your other data connections work over 4G, but not the web then it's probably an issue with AT&T's local service.

I'd use the "Mark the Spot" app (which every AT&T iPhone user should have) to report the outage and sleep on it. They may have it fixed by morning.

(You can download Mark the Spot via WiFi or iTunes.)