No one has ever been in this situation: someone (friend, relative, etc.) visits your home and wants to connect to Wi-Fi.
A, or you have to dictate the password for her, or take her iPhone and type in yourself; This is when you remember by heart, no, because there are people who use complicated passwords (or even keep the router standard) and still have to go there to see which one.
How iOS 11, that passed.
Now, it is enough that the two iPhones (or iPads or even Macs running macOS High Sierra) are close to each other.
When the person tries to access the Wi-Fi network, a notification appears on the network owner's device and, with a touch, it is possible share the password with her automatically.
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