Instructions
Turn off the PS3 and disconnect any ethernet cable from the console's rear.
Turn on the PS3. The cross-menu bar opens.
Navigate to the "Settings" area and choose "Network Settings."
Choose "Internet Connection Settings" and choose "Yes" when prompted to open the network setup wizard.
Choose "Easy." A prompt appears asking you to select your desired connection type.
Choose "Wireless" and choose "Scan." The console's built-in Wi-Fi adapter searches for nearby wireless access points. A list appears after the scan.
Choose the Wi-Fi network you wish to connect to from the PS3's results list. Take note of the network's "Security" type.
Select "Default."
Choose the network's security type, as noted in Step 7. If you chose WEP or WPA-PSK/WPA2-PSK, a password prompt appears. Enter the access point's password.
Press "X" to save the settings and select "Test Connection" to connect the PS3 to the network.