Save on mobile data by connecting your Samsung phone to a WiFi network. Follow these steps to learn how to connect to a WiFi network.
From the home screen, swipe up to open the menu.
Tap Settings.
Tap Connections.
Tap Wi-Fi.
Enable Wi-Fi.
All available wireless networks within range of your Samsung Galaxy S21 are listed.
Tap the network to which you want to connect.
If the network is not listed, make sure that the network is enabled and within range of your device.
Enter your WiFi network password and tap Connect, if you are prompted to do so.
Your device is now connected to the WiFi network.