In iOS 11, Apple has added a very unique feature where you can share WiFi password to another device just by bringing two iPhones/iPads together. You don’t even have to enter WiFi password on your another devices. It means if one of your device running iOS 11 is connected to a WiFi networks, you can easily share your WiFi password in iOS 11 to another device just by putting two phones together. Isn’t it amazing?
Here is an easy guide on How you can auto fill WiFi Password to another device in iOS 11 without entering it.
How to share Wi-Fi password in iOS 11 on iPhone or iPad
Note:(Remember one of the device should be connected to the WiFi networks. Here device 1 is connected to the WiFi)