Premium quality Earpiece Speaker with Flex Cable for iPhone 12 Pro Max (Warning: Soldering Required Compatible For Face ID Functionality).
You need the earpiece speaker and proximity sensor to make calls..
The earpiece speaker provides the sound during a call and the proximity sensor makes sure your phone screen is off when your face is close, so you won't press random buttons.
Earpiece Speaker with Proximity Sensor Cable is Compatible with iPhone 12 Pro Max.