The latest version of Samsung's Galaxy S smartphones features biometric security, the electronics giant has announced.

The Galaxy S5, unveiled at the Mobile World Congress in Barcelona, Spain, includes a fingerprint scanner to unlock the device.

The mobile is also water and dust resistant, and features a 16-megapixel camera which Samsung claims has the world's fastest autofocus speed of 0.3 seconds.

Simon Stanford, vice president for the IT and mobile division of Samsung in the UK and Ireland, said: "We've decided to go back to basics with the Galaxy S5 and focus on the features and things that matter the most to our customers - namely the camera, ability to view and download data and content quickly and their health and well-being.

"People want a smartphone that enhances and enables their mobile life. The Galaxy S5 represents just that, and we're excited to see the response to our latest flagship smartphone device."

The S5 will be available to buy from April.