Colossus Computech: How to Root Gingerbread Sony Ericsson Xperia X10

Good day dear Android Users, here is an exclusive tutorial on how to Root Your Sony Ericsson Xperia X10.
Just as the Symbian User thinks of how to hack their Symbian Phone and Sign their Applications, how iPhone/iPad Users think of how to Jailbreak their Devices to make use of some Applications and beats of their limitation, this is a major reason why Android Users need to Root their Android Phones to enjoy their Device to the fullest.

Why Rooting?
Let’s start with why you would want to root your Android Smartphone. Sometimes applications require special permission that the Android OS, which is based on Linux doesn’t allow. These could be simple as taking a screenshot to higher level permissions to the core Android files.
Rooting makes your phone run faster, increases battery life, allows it to run more applications, custom software and ROMs which allow complete control over every aspect of your device by allowing Superuser and Admin Level Permission. Removing carrier bloatware is a particularly enticing application and much more.
Enough for the introduction let's proceed with the Tutorial for today.

Guide to Root your Gingerbread Xperia X10

Warning: You must Back-up your Device before you Start the Rooting Steps.
Read the instructions in full carefully before applying each process. You need to be on stock Android 2.3.3 for this method to work.
Preparatory steps

Download Flash Tool (version 0.2.9.1) from here. Double click to extract and install the files. The FlashTool can be started by double-clicking X10FlashTool.exe.
Enable Unknown Sources (Menu -> Settings -> Applications -> Unknown Sources) & USB debugging (Menu -> Settings -> Applications -> Development -> USB Debugging) on your Xperia X10.

1. Start FlashTool [Make sure your Xperia X10 is not connected to your PC]
Start FlashTool by double-clicking X10FlashTool.exe in the folder where you extracted the files. Then press the ‘Flash’ button on the top left.

2. Kernel Downgrade
Highlight ‘aZuZu – Kernel Downgrade’ and make sure that under Firmware Content, ‘loader.sin’ is highlighted. Click OK.

3. Plug in handset
As per the instructions below, make sure your handset is powered down. Then hold the ‘Back’ button on the handset whilst plugging in the USB cable.

4. Flashing process
The handset will then be flashed and you should see an output as seen below. Remove the USB cable but keep Flashtool running.

5. Root device
Now disconnect the Xperia X10 (keep FlashTool running). Power on the device and as soon as you feel the vibration, re-connect the X10 via USB. You will then see the output as indicated by number 1 below.
Once that has been completed press the Root button (indicated by number 2 in the picture below).

Once the device is rooted you will see the output as per below. Keep the phone connected as the phone will then reboot.

Once you see the messages that the X10 is connected, disconnect the handset and take the battery out for 30 seconds.

6. Upgrade Kernel
Now you need to upgrade the kernel, so press the ‘Flash’ button on the top left of the FlashTool. Select the bottom firmware and press OK.

The message to connect your X10 will come up again. Make sure the X10 is powered off, then whilst holding the back button connect it to your PC via USB.