You can achieve WPA-PSK authentication by go down to settings option; select settings option > the in settings select option 2 which is Network Profiles > in Network Profiles you should have a check mark on one of the profile and select change > then go to WLAN Configuration and select it > then select option 5 which is Security Mode > if the phone is lock then press **# to unlock and select Security Mode > then choose option 6 which is Auto (AKM) and save > once you have save this option, then scroll down, you should have an option 9 - Pre-shared Key > that's where you can add WPA-PSK.