The handset will feature a 3D camera and a screen that, to view the 3D images, does not need special glasses. The handset will use technology similar to the Nintendo 3D. A special screen will transmit two differing images to the viewer and a different image must reach each eye to see the 3D effect.
LG has been moving aggressively into the 3D TV market in the UK,securing a deal to be the "preferred supplier" to Sky, which has launched a 3D channel.
LG claims the Optimus 3D will be "a complete platform for a one-of-a-kind experience on a mobile device," allowing content to be created and viewed, and then connected to full-screen devices.
LG launched a £6m cinema ad campaign last year, showing its debut cinema ads before 3D versions of films 'Tron Legacy' and 'The Chronicles of Narnia'.