This is a nice picture tutorial by maxyn

1. Get an E398 phone, a screwdriver and free time
Motorola E398

2. Remove the screws the way shown in the picture below:
Motorola E398

3. Now you have to remove the case from the main plate. First remove the top part and then the bottom. Hold the display, because it can fall
Motorola E398
Motorola E398

4. To the main plate you have the following connected - display, keyboard, speakers and camera. First remove the display. There is a small connector at the end of it
Motorola E398
Motorola E398

5. Now it's time to remove the keyboard. It's very easy, but be careful with the joystick - do not try to remove it
Motorola E398
Motorola E398

6. Now comes the block of loudspeakers. It is very wirdly arranged, since it is removed together with the camera. They are connected to the main plate with two platic holders. When you press one of them a little the entire construction will fall. Here you will see how the camera is connected with the plate - carefully disconnect this contact.
Motorola E398
Motorola E398

7. This is almoust everything. Only few minor details left - the sim card holder, the battery under the keyboard and flash card
Motorola E398
Motorola E398

8. You are ready. Everything is disassembled. Good luck in assembling it back (use the reverse order of the tutorial)
Motorola E398