You can use Wi-Fi as an alternative to the mobile network when establishing an internet connection. This way your phone doesn't use mobile data.
Step 1 of 6
Press Settings.
Step 2 of 6
Press Wi-Fi.
Step 3 of 6
Press the indicator next to "Wi-Fi" to turn on the function.
Step 4 of 6
Press the required Wi-Fi network and key in the password for the Wi-Fi network.
If the Wi-Fi network is password protected, a lock icon is displayed next to the name of the Wi-Fi network. You can get the password from the network provider or administrator.
Step 5 of 6
Press Join.
Step 6 of 6
Slide your finger upwards starting from the bottom of the screen to return to the home screen.