Samsung Galaxy S3 i9300 Disassembly & Assembly - Drop Test Repair

New Screens http://tinyurl.com/sgs3screen
If you've seen the drop test then you might find this puts your mind at ease for replacing the screen..
Metal Frame Swap http://youtu.be/_70-W9JjVjg
DIY repairs will void any warranty but may save you money :-)

FAQ: Can I just replace the glass screen as its only $20?
If you follow the link below you'll see it can be done
http://youtu.be/aZuiCsAtThw

Here are some high resolution scans to help identify the parts:
Mainboard & Parts 3Mb http://tinyurl.com/mainboardparts
Antenna Connections 1Mb http://tinyurl.com/sgs3antenna
Screen Back 3Mb http://tinyurl.com/screenback
Replacement Screen http://tinyurl.com/replacment-screen

After some experimenting I can confirm W1 is for GSM/3G and 
W2 is for Wi-Fi. The white antenna cable is for Wi-Fi only.

Shot with a Panasonic HDC-SD700