Sony has unveiled a new flagship smartphone that features 4k video recording and digital noise cancelling headphones.

The Xperia Z2 also has the first ever Phosphor LED display, which is 5.2 inches in size.

The launch of the Z2, which comes within months of the release of the Z1 handset, is likely to raise the eyebrows of those who bought the original version of the premium device.

Like its successor the Z2 is waterproof and dust proof.

Sony is also clearly using the Z2 to target the waning digital camera market, by increasing the spec of the camera functionality.

Not only does the camera capture 4k video, which is four times the resolution of full-HD, but it also features a number of new apps which enable the camera to be used to produce digital SLR style images.

The new apps include one which allows the background to be put out of focus, and another which allows augmented reality effects to be applied.

The device, which was unveiled by Sony at Mobile a World Congress in Barcelona this morning, is powered by the latest Qualcomm Snapdragon 801 processor, and claims better battery life than the Z1. The handset will also come with digital noise cancelling headphones.

Sony also used the event to unveil its new Xperia Z2 Tablet, which claims to be the world's slimmest and lightest waterproof tablet. It also features digital noise cancelling headphones and the Qualcomm Snapdragon 801 processor.