The shiny new iOS 11 went out to supported iDevices yesterday. So you're probably already enjoying its many benefits, but here's something you may not know: the behavior of the Wi-Fi and Bluetooth toggles in Control Center is confusing. You swipe up from the bottom, Control Center appears, you tap the Wi-Fi icon, it dims / turns grey, and voila - you've turned off Wi-Fi, right? Wrong. And the same goes for Bluetooth. It turns out that using Control Center to turn off Wi-Fi only results in your phone immediately disconnecting from any network you are connected to (and auto-join for...
Source: http://www.gsmarena.com/psa_turning_off_wifi_or_bluetooth_from_control_center_in_ios_11_doesnt_actually_turn_them_off-news-27382.php
