Using a screwdriver (hex T2), unscrew 2 bolts on the end of the phone.
Using the key tool, open the SIM card tray and remove it.
Do not push too hard this may cause damage.
Using a screwdriver (Phillips 1.5 mm PH000), unscrew 3 bolts and remove the bracket holding the connectors.
Disconnect the battery connector.
We strongly recommend disconnecting the connector to avoid a possible short circuit during disassembly.