http://wccftech.com/the-new-control-center-in-ios-11-does-not-let-you-turn-off-wifi-or-bluetooth-heres-why/

Apple had seen fit to release its next in line firmware, iOS 11 to the general public recently. While the platform features a bevy of forward-facing additions, both visually and performance related, users have been reporting various issues related to Wi-Fi and Bluetooth. Users report that even though they have disabled Wi-Fi and Bluetooth from Control Center in iOS 11, it does not seem to be disabled completely. To turn them off completely, you are required to disable it through the Settings app. So let’s dive in to see some more details on the subject.

Once you disable Bluetooth and Wi-Fi from the Control Center in iOS 11, it won’t be disabled completely. To completely disable the two options, you have to do it through the stock Settings app. This is quite annoying for some users as the whole utility of accessing the control toggles through the Control Center would be diminished.