• Download this file
• Rename the file to update.zip and place it in the root directory of your microSD card
• Power off the phone
• Power on the phone while holding the ‘X’ key on the physical keyboard to enter recovery mode
• When you see the triangle with the exclamation point, press the volume up key and camera button key (only press the camera key down half way)
• Navigate to “apply update.zip” and press the gold center button on the keyboard to select it. It will start the update process
• Reboot the phone after it’s finished.

Instructions from BGR