Tools required: Torx 5 screwdriver, torx 6 screwdriver, plastic tool such as a guitar plectrum or credit card.
Remove your back cover, battery, sim and memory card. Remove the two screws you can see. Then push your screwdriver into the four circled gaps. This releases the clips that hold the front cover in place. Now pull the front cover away from the phone.
With the front cover removed, your phone should look like below. The circled connector needs to be disconnected. It attaches like a plug and socket. Just lever it up to unplug. Now remove the two black screws you can see at the top of the phone.