The previous version of the galaxy family, the Samsung galaxy s3 was a completely success back when it came up selling more than 40 million devices just in one year. This device back in 2012 was considered by most the best smartphone on the market. This made Apple react because it was losing power on the industry so a couple months after the Samsung galaxy s3 came up, they create the new IPhone 5. This device completely went over the galaxy s3 making apple gain again the power and number 1 spot on the phone industry. The galaxy s3 couldn’t compete with this amazing new device created by Apple so Samsung started investing on creating a phone completely new and better. This phone was ended called the Samsung galaxy s4.
One of the most impressive things about the phone is the fact the size hasn't changed from its predecessor - the Galaxy S4 comes in at 5.38 x 2.75 x 0.31 inches, meaning there's no extra heft to try and work with in your palm.
The screen on the galaxy S4 has been increased to a screen of 5 inches, display with Full HD resolution. This means the same amount of pixels you'd have seen on a TV that cost well over $1500 four years ago is now riding around in your pocket.
Let's not pretend that Samsung is a pioneer in this area though: like a great many