Step 3: Step 3: Face-Off (basic disassembly)
Now, the lower part contains the secondary board, that contains the secondary keyboard (the cursor keys, the SEND/END keys, the soft keys, and the music/back keys) and the loudspeaker, that sounds very originally through the grille in the center of the cursor keys); the upper part contains, well, the screen. To remove them, we must first remove the lower part. Notice the plastic frame that surrounds the border of the secondary board? It can be pried out just by pulling towards you with the plastic flat screwdriver. You fold out this part exactly like you did with the main board in step one, towards the screen. Now, watch out with the "folding" process: the upper part of the "frame" is inserted in a slot beneath the screen; when folding out the piece, gently pull it out first, to free this upper part in order to detach it completely. After this, the screen will pop out easily.
Now, this is the end of the basic disassembly process. If you want to replace any major part (screen, keyboard, etc.), you shall be good until here. Remember to keep extremely clean the screen and back of screen cover surfaces; if you leave any debris, fingerprint, or anything, you will not notice it until it's too late (that is, until you reassemble it back), and of course the only alternative to fix it is to repeat all the disassembly process to clean it. Although the experience of repeating all the disassembly/reassembly process can be instructive as a field practice, remember that there are several plastic notches, pins and screw holes that can be easily broken due to extreme stress. Which reminds me: be very gently with the torque applied to the screws when screwing them back. To reassemble all, trace back the disassembly process from this point to the step 1.
Now, do you feel adventurous? Or maybe your spare part requires a more thorough disassembly, like replacing the SIM/microSD slots, the camera, the earpiece or the antenna? Then, keep your helmet put on, and let's continue!