Difference between the iPhone 3G and iPhone 3GS Glass Digitizer Touch Screen and LCD

If you’ve broken your iPhone 3G or 3GS and contemplating on one the following scenarios think again:

“Why can’t I replace my broken iPhone 3G Digitizer and/or iPhone 3G LCD with a newer iPhone 3GS Digitizer and/or iPhone 3GS LCD, it has to be better, right?”

or

“Why can’t I replace my broken iPhone 3GS Digitizer and/or iPhone 3G LCD with an older and cheaper iPhone 3G Digitizer and/or iPhone 3GS LCD?”

The answer to all these is simple. Apple slightly changed the connectors on the mainboard of the iPhone 3GS.