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Turning Off Wi-Fi and Bluetooth in iOS 11's Control Center Doesn't Actually Turn Off Wi-Fi or Bluetooth (vice.com)
An anonymous reader shares a Motherboard report: Turning off Bluetooth and Wi-Fi when you're not using them on your smartphone has long been standard, common sense, advice. Unfortunately, with the iPhone's new operating system iOS 11 - which was released to the general public yesterday - turning them off is not as easy as it used to be. Now, when you toggle Bluetooth and Wi-Fi off from the iPhone's Control Center -- the somewhat confusing menu that appears when you swipe up from the bottom of the phone -- it actually doesn't completely turn them off. While that might sound like a bug, that's actually what Apple intended in the new operating system. But security researchers warn that users might not realize this and, as a consequence, could leave Bluetooth and Wi-Fi on without noticing. Numerous Slashdot readers have complained about this "feature" this week.
Another decision to impede security in the name of convenience. People act like Microsoft only does this.
If you long-press on one of the buttons in the control center, it pops up a larger display that sort of details whats going on.
If you tap the wifi or bluetooth buttons to turn them off, the blue highlight turns gray and the text in the larger display will say "disconnected". If you turn them off in the settings app, the highlight turns gray and there's a line through the wifi/bluetooth logos and in the larger display it says "off".
The airplane mode button which is the first button in the control center, when pressed, turns everything off.
It's not obvious and I didn't really know that this is how it worked until I saw the Apple support doc. Knowing now how it works, I don't mind so much. It means on my iPad I can have Bluetooth on, but "disconnected" and still be able to use the pencil (rather then having to have BT fully on).