BlackBerry Curve 8900 Microphone Replacement

Remove battery cover and battery on the back of the device.

Using a small plastic opening tool, remove the lower rear cover.

Remove six screws from the midframe of the device.

Remove the midframe from the phone.

Gently pry the back the plastic tabs that secure the motherboard to the case.

Slowly work your way around the case until the tabs until the motherboard comes free.

Remove the screen so as not to damage it.

Carefully unhook the antenna cable in all three locations.

Detach the ribbon cable on the front of the motherboard.

Tilt the motherboard up and detach both ribbon connections.

Replace the entire motherboard to replace the microphone (circled in red).