Swipe down from the top of the screen to reveal the Notifications menu.
Tap the Settings icon.
Scroll to, then tap Wi-Fi.
To enable or disable wi-fi, tap the Wi-Fi switch. Note: To optimize battery life, turn Wi-Fi off when not in use.
Tap the desired network. Note: Scroll to, then tap 'Add Wi-Fi network' to connect to a hidden or unbroadcasted Wi-Fi network. You will need to enter the network SSID, security type, and a password (if necessary) to continue.
If connecting to a secure network, enter the password. Note: Secure networks will be displayed with a lock over the signal icon.
Tap Connect. Note: Data transmitted over a Wi-Fi network does not count toward your AT&T data plan, and will not be billed.