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Unfortunately, Xperia L does not support connection of a DualShock 3 controller.
A USB-cable + OTG-adapter is needed to pair the PS3 controller to the phone. But since Xperia L is not supporting DUALSHOCKโข3 it will not work.
The meaning of Playstation certified is that your unit can access Playstation mobile and download variety of content. More info can be found at the following link:
http://www.playstation.com/psm/index_e.html
I'm not really sure what you mean by unofficial version, but we do not have any solution for this.