Apple users have unwittingly discovered a new feature after installing iOS 11 on their mobile devices: when you toggle your Wi-Fi and Bluetooth quick settings to “off” those services remain on for Apple services.
For example, Location Services is still enabled, and Handoff and Instant Hotspot stay on, even when iPhones and iPads are put in “Airplane Mode.”
The change in iOS 11 has come under criticism because it could expose users to security risks.
Because iOS 10 allowed users to perform a quick swipe in the Control Center to toggle Wi-Fi and Bluetooth fully off, users reasonably believe they had the same capability in iOS 11.
Source: Computer World – All Content