Like many newer mobile gaming devices, including the upcoming NVIDIA Project SHIELD featuring Tegra 4 technology, the Galaxy S4 also connects to your big HD TV.

FORBES: How Samsung Galaxy S4 Will Compete With Sony PlayStation 4

Amazing games including Real Boxing and Hawken, which utilize the latest Unreal Engine technology, look fantastic on Project SHIELD.

ENGADGET: NVIDIA unveils Project Shield, a Tegra 4-powered Android gaming handheld

Like so much technology that eventually makes it on to the marketplace, the Shark Shield isn't exactly new.

CNN: Divers embrace anti-shark device

The technology does exist to cut out mobile phone signals altogether, by forming a Faraday shield, or an enclosure made of conducting material.

BBC: Who, What, Why: How do you stop mobiles in concerts?

Overlooked by FIFA for those tournaments, Hawk-Eye -- which already provides ball-tracking systems for tennis and cricket -- will install its technology in 20 Premier League grounds and at Wembley, which will host August's Community Shield.

CNN: England on course for goal-line history