To forget a WiFi network on iOS (iPad, iPhone, iPod Touch):
- Open Settings.
- Tap "Wi-Fi".
- Tap the "i" in a circle next to the network you want to remove.
- Tap "Forget This Network".
To forget a WiFi network on Android:
- Open Settings.
- Under "Wireless & networks", select Wi-Fi.
- Tap the WiFi network you want to remove.
- Tap "Forget".
To forget a WiFi network on Windows 10:
- Open Settings.
- Select "Network & Internet".
- Select "Wi-Fi" on the left.
- Select "Manage Known Networks".
- Select the network you want to remove.
- Select "Forget".
To forget a WiFi network on macOS:
- Open System Preferences.
- Click "Network".
- Click "Wi-Fi" on the left.
- Click "Advanced".
- Click on the network you wish to remove.
- Click the minus sign.
- Click "OK".