Samsung Galaxy S4 was launched some weeks ago with a lot of hype. It came with both quad-core as well as octa-core processors and it was released with different carriers and variants. The method to root the Samsung Galaxy S4 was different for different variants and carriers. There was no common method.
XDA Elite Recognized Developer AdamOutler has created a simple method to root and install the TWRP recovery on the AT&T Samsung Galaxy S4. The user will have to install the CASUAL tool on the computer and then just click the “Do It” button. After a few moments, the device will be rooted and TWRP recovery will be installed. All this without any fuss !