Here is the diagram review of iPhone 3Gs complete front screen assembly parts, from which you will see the full parts included into the iPhone 3Gs front screen assembly. Meanwhile you will get to know where exactly each small part is located.
At the top of the screen assembly, it includes iPhone 3Gs touch screen, the iPhone 3Gs earpiece receiver, anti-dust mesh, and the proximate light sensor flex cable. Between the touch screen and lcd screen display, it is the 3Gs home button and flex cable. Under the mid plate chassis, you will found the iPhone 3Gs lcd screen display and the metal back plate.
Please kindly take note proffessional skill is required for the iPhone 3Gs front screen assembly or disassembly, so please make it absolutely sure before your DIY. Considering those iPhone end users who are unafamiliar with iPhone repair, the iPhone 3Gs mid frame assembly or touch screen half assembly with frame for your easy replacement. What you should do is to upplug the front screen assmembly, and replace with a new one. That's it.