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

Remove the back cover with the opening tool, this will prevent scratches on the housing.

Remove the battery by pulling on the bottom.

Remove the micro SD card.

Remove the micro SIM card.

Remove the 9 Phillips screws that hold the intermediate housing.

Remove the intermediate housing with the opening tool.

Disconnect the upper end of the coaxial antenna cable.

Disconnect the data flexes from the digitizer and display.

Unplug the SIM reader from the motherboard.

Remove it from the metal shield with a pick.

Separate the base plate from the chassis.

Disconnect the sound module from the motherboard.

Remove the rear camera, by pulling on the tab of the connector and pulling gently on it.

Repeat the process with the front camera.

Install the components on the new motherboard.