Apple mobile devices have a feature called Airplane mode (in Settings), which serves to turn off any and all transmissions from the device, so that it does not interfere with the aircraft’s aeronautical instruments (hence the name). In theory, you are required to activate this mode for the entire flight.
But more and more airlines are modernizing, making Wi-Fi networks available to passengers (such as GOL and TAM). How to take advantage of these features, if the iPhone / iPod / iPad should continue in airplane mode?
Not everyone knows, but since iOS 4.0 this is already possible. To activate it, you must first enable Airplane Mode in Settings.
Then, just activate the Wi-Fi network normally. It will continue with all radio and GPS transmissions turned off, but will allow you to connect over wireless networks. This is also ideal when traveling, when you will not use the phone, only the Wi-Fi network, but need to save battery.
The tip also applies to the iPad 3G and for the iPod touch.
The section Did you know is aimed at beginners in the iOS world. For more tips, check out this link.