When you have finished removing all of the screws, place the plastic opening tool in the groove at the bottom left corner of the motherboard cover and lift up.

Make sure to remove the SIM card before you remove the motherboard cover. You can get the cover off without doing this, but the SIM card will be stuck underneath the cover once you put it back together.

This part could be more difficult if you have never removed the motherboard cover. If difficulty arises, pry the plastic opening tool into each groove along the edge of the motherboard cover until it releases.

Once a clip is released, you can detach the motherboard cover with your fingers and set aside.