Tools required: Torx 6 screwdriver, Torx 5 screwdriver, thin plastic tool such as a guitar plectrum or credit card.
Remove your back cover, battery, sim and memory card. Pull the silver cover in the direction shown by the arrow and it'll pop off. Some force is required.
You should now have the silver cover removed. Now remove the two screws at the top of the phone. The one in the top left may be covered by a piece of paper.