Not sure on if that will show on the older models of iPhones, but do not be fooled, you are not getting real 4G. This was a very sly move on ATT's part and I would not be surprised if they suffer some repercussions from this since you cannot get real 4g without a 4g antenna which no iPhone has yet....
Moderation Notice:​ This thread has been closed by the iPF Staff in accordance with our Forum Rules. Let's keep all discussions regarding iOS 5.1 in the main thread here... http://www.iphoneforums.net/forum/iphone-news-site-news-7/ios-5-1-released-35411/ . Thank you very much!!