The first step is to download and install Superboot, a boot image that, when flashed, will root the device the first time you boot up.

Once downloaded, extract the files it contains to a directory on your computer, just like any other zip file.

Now put your Android phone in bootloader mode.

• To do so, turn off the phone, remove the battery, and plug in the USB cable. When the battery icon appears onscreen, pop the battery back in. Now tap the Power button while holding down the Camera key.
• For those whose Android phones have a trackball, you have an even easier method of doing this: Turn off the phone, press and hold the trackball, then turn the phone back on.

Depending on your computer's OS, do one of the following:

• Windows: Double click "install-superboot-windows.bat"
• Mac: Open a terminal window to the directory containing the files, and type "chmod +x install-superboot-mac.sh" followed by "./install-superboot-mac.sh"
• Linux: Open a terminal window to the directory containing the files, and type "chmod +x install-superboot-linux.sh" followed by "./install-superboot-linux.sh"

That's it, your device has been rooted!