Why doesn't my iPhone have the o Internet?

Okay I know this question looks confusing, so ill explain it. You know how on iPhones there's 3 types of Internet? The 3G, E, and o? Yeah we'll my iPhone 4 doesn't get the o. It just turns into this and I can't use Internet. image

Umm also I don't have an iPhone data plan. I had a normal non smart phone and got a $10 data plan on that then I put my SIM card in the iPhone. And plus I have had the o before but it was only one time on the highway. I also get it when I don't have any Internet and I call someone. It shows up in the call then goes away when I hang up.

Also is anyone else on AT&T having problems with the service going in and out. It's been happening to me since yesterday. Can someone tell me what's going on! Are they making new towers or because its raining or what?

The o you mean is the Wi-Fi connection right?
It can only be acessed by command(with password if required)
But I'm not sure about the rest, sorry about that

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