Launch the pre-installed application that supports tethering and then name your Wi-Fi. Put a password if you wish, although this is optional. Press the "Start" button to begin broadcasting the Wi-Fi signal. Connect it with any other device by opening up your wireless network list and then click on the Wi-Fi network. If you have enabled the password, enter it. Press the "Associate" button if it doesn't connect by itself. Check out elaborate details on http://google.about.com/od/socialtoolsfromgoogle/fr/barnacle-tether-wifi-android-app.htm.