This is the Sprint model, SPH-L900. It's not his fault that your phone is different.
Be careful with aligning the springs when you re-assemble the trigger buttons, they need to fit properly into their slots.
...also in this step, the pictures show the analog stick disappearing without a step to remove its two silver screws.
...as well as the hidden 4-conductor ribbon cable on the upper right that connects to the analog stick.
Don't forget to disconnect the two tiny ribbon cables on the bottom of the motherboard that attach to the microphone and home button.
There are two additional brass screws holding the top panel plastic on to the frame. They are 00 Philips and shorter than the ones securing the motherboard.