On the “PlayMemories Mobile” software
To perform the operations such as [Ctrl with Smartphone] and [Send to Smartphone], “PlayMemories Mobile” is necessary. Install it from the application store of your smartphone or tablet. If the “PlayMemories Mobile” software is already installed on your smartphone or tablet, upgrade it to the latest version.
For details on “PlayMemories Mobile,” refer to the “PlayMemories Mobile” support page (http://www.sony.net/pmm/).