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To browse your phone content on your TV you need to launch media server on your Xperia SP. You can do that by going to Settings > Wireless & Networks > More > Media server settings and set Share content to on. As for remote, there is Sony app for that TV SideView: Remote by Sony. I haven`t used it so I can`t tell you much about it.
Media server is wireless, it uses DLNA over WiFi. As for remote app, I`m not sure but I guess it is also wireless.