This article is just for me or SE Xperia Ray’s user, or the other android geek’s user. Before i have SE Xperia Ray (codename : ST18), i have another SE Xperia phone (X8/Shakira).
Rooting is similar get access root in Linux, to get full access like administrator in windows. Or see the meaning of rooting android in wikipedia
Rooting is a process that allows users of mobile phones and other devices running the Android operating system to attain privileged control (known as “root access”) within Android’s Linux subsystem with the goal of overcoming limitations that carriers and manufacturers put on some devices.
Ok now, i wanna share how to rooting SE Xperia Ray (ST18). First, download the tool : i use a flashtool made by Androxyde (XDA Developer), download here. Then install it to the PC/Notebook.
Before you connect the device to the PC/Notebook, please check USB debugging in your phone (Settings –> Application settings –> Development)
Now, run a Flashtool then connect your phone to the PC/Notebook.
Then click icon unlock, wait until info message appear in flashtool “Root Access Allowed” And Congratulation, your Ray has been rooted successfully.
To check your phone has been rooted actually, let’s install some apps that needed root access like Root Explorer (download here)
Hopefully this article can be usefull 
