The Samsung GALAXY S 4 has a tough act to follow. Its best-selling predecessor, the Galaxy S III, is arguably the most well-known of all Android handsets, the strongest competition to Apple's iPhone, and the automatic go-to device for many smartphone shoppers. While the GALAXY S 4 may look, at first glance at least, much like the phone that came before it, in actual fact almost everything has been changed, adding up to a hotlist of in-demanded technology. So, is the GALAXY S 4 more than the sum of its parts, or have recent high-profile devices like the HTC One stolen its thunder? Read on for the SlashGear review.