Control Center has always offered the ability to quickly disconnect from WiFi or Bluetooth, but with the release of iOS 13 you can now quickly change WiFi networks. This is useful for a variety of obvious reasons, such as transitioning from your WiFi network at home to outside connections like work. Instead of navigating to the Settings app, you can now switch networks with a swipe and couple of taps. Here's how:
If you've ever entertained a group of guests, all who want to get on your Wi-Fi, you know it can be both annoying and tedious, especially if you have an alphanumeric string as a password. iOS 11 made it much easier by allowing you to share your Wi-Fi password, but there is an even easier way that you don't even have to involve yourself with, aside from the initial set up. You can create a QR code, allowing your guests to simply scan it to join. Print it out, frame it, leave it in the guest rooms or wherever is convenient.
If you have updated your iPhone or iPad to iOS 11, you may have noticed that the new Control Center toggles for Bluetooth and Wi-Fi don't fully turn off either service. If you turn them off you will disconnect from any devices that your iPhone is connected to, like AirPods, heart rate monitors, wireless speakers, or other accessories, but both services will remain on. This wasn't the case with iOS 10, where both could be fully disabled from the Control Center.