The article says:
If you turn off cellular data, you will be unable to:
See the cellular data icons in the status bar (for example, LTE or 3G).But when I switch off cellular data and 3G (because I want wifi only), although the "3G" disappears, I can still see carrier name "O2 UK" and the signal strength bar on my iPhone 4S. Is this normal? It doesn't happen on my iPad. When I switch off cellular data on the iPad, the carrier's name etc disappears and I just get the wifi icon.
Thank you
View the Correct Answer HT4203 o2 icon in status bar when cellular data OFF in iPhone Correct Answer , iPhone Wi-Fi, 3G and Bluetooth Help