One of its more convenient features is the ability to change your Wi-Fi network from an iPhone's Control Center — without having to go through Settings, the main previous method.
Control Center can be accessed by swiping down on the top right-hand corner of the screen on your iPhone X or later (or from the bottom of the screen on older models), whether it is locked or not.
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1. Tap the screen of your iPhone to wake it up.
2. Swipe down on the top right-hand corner of the screen on an iPhone X or later, or up from the bottom of your screen on an earlier iPhone running iOS 13. It doesn't matter if your iPhone is locked or unlocked.
3. Find the Wi-Fi icon.
4. Tap and hold firmly until a new screen pops up.
5. Find the Wi-Fi icon once again, and press and hold firmly.
6. A list of Wi-Fi networks will appear in a list. Scroll to find the network you wish to connect to, and select.
7. A checkmark will appear next to the network's name once you are connected.
If you're connecting to a new Wi-Fi network for your iPhone and is not public, you will be required to enter a password.
After selecting the private Wi-Fi network, a new screen will prompt you to enter the password. Once you've done that, tap Join in the upper right-hand corner.