Recently, a lot of customers have been reporting the Aluminium band on the iPhone 5 Slate and Black colour to be chipping and revealing its silver.
A few users who were extremely concerned went and emailed various departments in Apple.
Luckily a person called Alex, email regarding this issue.
And Phil replied confirming this issue is “Normal”
According to Apple, over use, Aluminium starts to reveal the silver colour as Black is painted on it.
I find it funny, why launch something if you know it will have flaws?
Any aluminum product may scratch or chip with use, exposing its natural silver color. That is normal.