3G instead of AT&T 3G?

[iGraves]

I've noticed on the apple websites or just some photos from apple or the app store showing what the app does at the top it says just the signal and 3G with AT&T, and I was wondering how to it or/and can you do it? Been on my mind for a while now..

 

[iGraves]

Here is a picture and this is what I'm talking about

**edit, sorry for terrible quality