Same here. I followed instructions laid out by DUALSHOCK app on my Xperia SP, after connecting OTG, the app says controller is ready to be used wirelessly. However once otg is disconnected controller does neither gets detected nor connects.
I recently upgraged to 4.3 update from Sony but before this upgrade the same controller was working flawlessly over bluetooth. Since the upgrade it is only working with cable but not over bluetooth.
Just for information the controller in question is not genuine, so it could be the case that Sony has found a way to detect fakes and stop wireless fuctionality with last update/upgrade. If thats the case then I was wondering how on Earth Sony managed that
Any help in getting my current controller working would be highly appreciated.