This application recover the default WPS PIN. You can connect to wireless networks which have enable the protocol WPS.
https://play.google.com/store/apps/details?id=com.MelasGR.wifiunlocker&hl=en_GB
similar - https://play.google.com/store/apps/details?id=com.xti.wifiwarden&hl=en_GB
#wps
origin - http://www.pipiscrew.com/?p=11798 wifi-wps-unlocker