May 13th, 2015 Root your Android in seconds with KingRoot
This app is developed by the popular developer and hacker Geohot, who has found vulnerabilities in Apple devices (the iPhone) and Sony (the Playstation 3, to be exact). That is to say, this app comes with the best guarantee possible.
Once you have the application installed on your device, just run it and tap the button that says 'make it ra1n'. In just a moment, without even having to restart, your Android phone will be perfectly rooted.
Towelroot is currently one of the best alternatives that you can find to root your Samsung Galaxy S5 or S4. It can also root a Nexus 4 or 5, and other models, too. In short, if you want to root a device, this is the best option.
NotesA warning issued by Google says that installing Towelroot could compromise the integrity of your Android device. You should ignore this.