How does iTunes know the color of your iPhone? (Which hardware part provides this info)

[k3u]

I'm curious because I am replacing a friend's iPhone 4. She has bought both a White and Black on off Craigslist. And I told her I could convert it for her because the White one is locked and the Black one she is currently using is unlocked so a LCD convert and back housing should do it however. I want her to get as close as possible to a OEM White iPhone. I notice when you plug a White/Black iPhone 4 into iTunes/Computer it shows you the correct color. Now which hardware do I also need to replace in order for the correct information to show up?

[805 93003]

Once iTunes reads the iPhone Serial # off the Logic Board it knows everything about the iPhone. I do not know if it cross checks with other identifiying #'s like IMEI etc. But all it needs is the Serial #.

[k3u]

Once iTunes reads the iPhone Serial # off the Logic Board it knows everything about the iPhone. I do not know if it cross checks with other identifiying #'s like IMEI etc. But all it needs is the Serial #.

Dang it, so what you're saying is that the logic board holds this information and the base band chip is ALSO on the logic board so essentially there's NO way a converted iPhone can show up the correct color right? Unless you also change the logic board but in this case I want to keep it since it has a specific unlockable base band my friend needs.