Download the update file from Google’s server: http://android.clients.google.com/pa...D.2854b06b.zip
Copy the file to the root directory (aka not inside any folder) of your microSD card and name it update.zip Tip: Be careful not to name it update.zip.zip
Power off your phone.
Hold down the VOLUME DOWN button and power it back on.
Wait for your phone to load the skating Androids screen. Scroll down to recovery and press the POWER button.
When you see the “/!\” symbol, press the POWER button and the VOLUME UP button at the same time. You should be presented with a menu and one of the options should be “apply sdcard:update.zip”.
Use the trackball to navigate to “apply sdcard:update.zip” and select it.
When you see “Install from sdcard complete”, select “reboot system now”.
The whole process takes about five minutes