Apple's iOS 10 will give you a warning when you're connected to an unsecured Wi-Fi network
Apple has been mum about it so far, but it appears that iOS 10 will provide iPhone and iPad users with a warning when their device is connected to an unsecured Wi-Fi network. Don't expect to see a flashing screen with a siren, or a Dennis Nedry type pop-up saying "Ah ah ah. You didn't say the magic word." Instead, the warning will appear when you head to Settings > Wi-Fi.
Many of us use unsecured Wi-Fi networks every day without giving it a second thought. For example, some large cable T.V. firms like Xfinity (Comcast) and Time Warner offer Wi-Fi Hotspots for their customers dotted throughout their coverage area. While the cable firms usually flash a reminder that their network is not secure, not all unsecured Wi-Fi networks do. And that is where Apple's new feature serves as a handy reminder to watch what you're saying.
In iOS 10, Apple will warn you when you are connected to an unsecured Wi-Fi network
source: RedmondPie
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Things that are NOT allowed: