From a home screen, tap Apps (located at the bottom).
From the Apps tab, tap Settings.
Tap Wi-Fi.
Ensure the Wi-Fi switch (located in the upper-right) is turned then tap the preferred Wi-Fi network. If the preferred network is not listed, it can be added manually.
If presented, enter the appropriate password then tap Connect. To view the password as it is being entered, tap (check) Show password.