Note: The writer (or owner of this blog) would not be held responsible for any kind of damage to your device or anything related to it.

This method has been tested to work in following scenarios:

• If you are on GB firmware version 4.0.2.A.0.62 or 4.0.2.A.0.42
• If you are on ICS (unrooted only) and want to downgrade it back to a rooted GB.

Rooting Xperia Ray is not an easy job as Sony fixed the vulnerability that allowed the device to easily get rooted. So here is what you should do to get the device rooted.

Things you would need:

1. Flashtool (Only if you have got firmware version 4.0.2.A.0.62 or unrooted ICS on your device)
   Download it from here: http://androxyde.github.com/
2. Firmware version 4.0.2.A.0.42 (Only if you have got firmware version 4.0.2.A.0.62 or unrooted ICS on your device). To check firmware version, go to Settings->About phone->Build Number
   You can download this firmware from here: http://www.mediafire.com/?17u4y4qdv8rbsib
3. DooMLoRD’s Easy Rooting Toolkit (Download it from here: http://forum.xda-developers.com/attachment.php?attachmentid=841876&d=1325678726)

If you are on GB firmware version 4.0.2.A.0.62 or ICS, you need to follow both the flashing and rooting steps in order. Otherwise, you can skip to the rooting step.

Steps to follow – Flashing:

1. Make a complete backup of all your data as you might lose them after flashing or rooting. If you don’t care about the data, skip this step.
2. Install and run Flashtool.
3. Make sure that there are no security applications (such as avast! Or AVG) installed on your device.
4. Make sure that “Unknown sources” in Settings->Applications and “USB debugging” in Settings->Applications->Development are checked.
5. Make sure that adb drivers for your device are installed. If you have got the “Sony PC Companion” installed and have used it previously to connect your device, you need not worry.
6. Connect your device to the pc.
7. Drag “by _boy_racer_ (ST18i)_4.0.2.A.0.42_ce.ftf” file to Flashtool.
8. Click Flash (Bolt sign) and wait until flashing is complete.

Steps to follow – Rooting:

1. Make a complete backup of all your data as you might lose them after flashing or rooting. If you don’t care about the data, skip this step.
2. Make sure that there are no security applications (such as avast! Or AVG) installed on your device.
3. Make sure that “Unknown sources” in Settings->Applications and “USB debugging” in Settings->Applications->Development are checked.
4. Make sure that adb drivers for your device are installed. If you have got the “Sony PC Companion” installed and have used it previously to connect your device, you need not worry.
5. Unpack DooMLoRD’s Toolkit and run “runme.bat”. Press any key to continue. You are now rooted. In order to confrim, install Root Checker from Google Play.

Now it is up to you whether you want to upgrade your device to the latest GB firmware by Sony (via FOTA) or leave it to the current firmware. Your root will remain intact in any case. However, upgrading your rooted GB device back to ICS has not been tested and is not recommended.

Your suggestions and queries are welcomed in the comments below.