There are times that you wish to change Wi-Fi networks on your iPhone. This is not a big deal, but it can be a pain finding your Settings icon on your device. If you wish to change your Wi-Fi network, you don’t have to search your iPhone for Settings, just do it from the Control Center. Here is how that works.
To get into Control Center, you swipe down from the upper-right corner of the Home Screen.
Inside the Control Center, you need to tap and hold on the Wi-Fi symbol.
You will end up in this window.
Now, tap and hold on the Wi-Fi symbol again, and you see a list of available networks.
Just tap on the network and your iPhone is switched to it.
If you need to switch Wi-Fi networks on your iPhone, there is an easy way to do that in the Control Center.