Before removing the casing, we will have to remove the SIM and SD trays. To do this, we will use the tray opening tool that, introducing it through the hole in it, we will make it self-ejected.

In order to remove the back cover, first we must remove the two screws hidden behind the "window" of the infrared sensor.

Then we will leverage with an opening tool to extract it.

In this step, we separate the components that may be damaged at the time of desoldering the vibrator.

It only remains to desoldar the vibrator of the base plate and desencajarlo of the chassis.