Download the following update zip and place it on your external sd. Go to settings/security and make sure unknown sources is unchecked.
Shut off phone. Press volume up, power and home button at the same time. As soon as you see a flash, let go of the buttons. This will put you in stock recovery. Using the volume bar to select and power button to activate, select update from external storage. Choose the file you previously put there. Push your power button. Your update will begin.
This is only for those with STOCK unrooted phones with STOCK recovery.
Get your zip file here...