How to Block a WiFi Network on iPhone or iPad

Open your iPhone or iPad's Settings app. Find and tap the iPhone Settings App Icon icon on your home screen to open the Settings menu.

Tap Wi-Fi on the Settings menu. You can find this option at the top of the menu. It will open a list of all the available Wi-Fi networks around you.

Tap the blue ℹ︎ icon next to your Wi-Fi network. Find the Wi-Fi you're currently connected to, and tap the blue "Info" icon next to its name on the right-hand side. The Info button looks like a blue "ℹ︎" in a circle. This will open the selected Wi-Fi's details on a new page.

Slide the Auto-Join switch to iPhone Switch Off Icon. This will prevent your iPhone or iPad from automatically connecting to this Wi-Fi network whenever it's available. You can still connect manually by tapping the network's name on the Wi-Fi list.

Tap Forget This Network at the top. This option is written in blue letters at the top of the Info page. You will have to confirm your action in a pop-up window.

Tap Forget in the confirmation pop-up. This will disconnect from the selected Wi-Fi, and remove its settings and password from your iPhone or iPad. If you want to reconnect to this Wi-Fi, you'll have to enter its password.