Before setting up, make sure that the mobile is switched off.

Remove the tray with SIM and SD cards.

Peel off the covers that cover the housing screws.

Remove the Phillips screws that secure the housing.

Separate the back cover by prying it with an opening tool.

Remove the shield covering the connectors on the motherboard, held by 1 Phillips screw.

Disconnect the battery from the motherboard.

Disconnect the interconnection flex.

The battery is glued with double-sided adhesive. This adhesive is provided with a piece of tape to pull sideways and thus take off the battery.

If the adhesive breaks when you pull, use an opening tool to pry it little by little and then take off the battery.