Before starting, make sure that the mobile is turned off.

Starting from the small notch in the upper right corner, disassemble the back cover.

Once the top part is released, the rest of the lid will come out easily.

Remove the battery by pulling on the bottom.

Remove the SIM and micro SD cards.

Remove the 10 Phillips screws that hold the middle housing.

Note that one of the screws is covered by a white sticker.

Use a flat plastic tool to disassemble the intermediate housing.

Separate the intermediate housing.

Disconnect the lower end of the antenna coaxial cable.

Finally, take off the lower antenna plate with the metal spatula.