5. Airplane Mode Behavior
In iOS 11, Apple has changed the behavior of the Airplane mode toggle as well. When you first tap it, it will disable Cellular access along with Wi-Fi and Bluetooth. However, if you enable Bluetooth or Wi-fi toggles or both when Airplane mode is on, then it will remember the last state the next time. So the next time you enable Airplane mode, it won’t disable the Wi-Fi and Bluetooth toggles if you had turned them on the last time.
This can be a bit confusing as we are used to Airplane mode disabling all radios, but if you have a habit of enabling Wi-Fi or Bluetooth or both in Airplane mode then it is quite convenient as you don’t need to keep doing it manually. iOS remembers it for you.