iPhone 4S SIM Card Tray Replacement

Begin the process by carefully disconnecting the 12-volt battery, ensuring you wear appropriate eye protection and gloves, then use a 10mm wrench to loosen and remove the negative terminal clamp, followed by the positive terminal clamp, utilizing a 13mm wrench for that connection.Employing a SIM card eject tool or a straightened paperclip, release the SIM card and its tray from the device.
Applying considerable pressure might be necessary.
Using a SIM ejection tool or a small, sturdy paperclip, carefully release the SIM Card tray assembly from the iPhone's side.

Using a 5/32-inch hex key, carefully loosen the four screws securing the fan assembly to the motor housing; exercise caution to prevent damage to the plastic components and ensure the screws are not lost.Carefully extract the SIM card from its designated compartment within the SIM card tray.

Using a 5/32-inch hex key, carefully tighten the retaining screw on the motor assembly to a torque of 3.5 Nm, ensuring that you do not overtighten and damage the threads.The SIM card tray will stay in place.