After Samsung galaxy s2 receive the update to android 4.1 Jelly Bean which is with I9100XWLSD firmware verison. In this guide i will give you tutorial how to root Samung Galaxy S2 with android 4.1.2 I9100XWLSD using siyah kernel . To enable the root permissions on the one of the samsung flasgship phone there is a siyah kernel that will hel you, the safest and most reliable method existed at the time. I describe that the term of root android world refers to the ability to obtain root privileges, example linux systems administrator, to grant applications that require them. Read First Update Galaxy S2 To android 4.1.2 with I9100XWLSD firmware version Root will void your warranty First read the entire manual and follow the step exactly with i described below. Make sure that your pc is installed the galaxy s2 driver (just get Kies ). root the Galaxy SII will not delete your data, but it's always recommended to do a backup. Read how to perform ...