I've got yellowing in the bottom right quarter of my rMini 
I've read somewhere that running the rMini on full brightness for a couple of days can cure the problem, but I'm not convinced.
I'd take it back to Apple for an exchange but there's no stock of the 128gb cellular units at any of the stores nearby.
I've read somewhere that running the rMini on full brightness for a couple of days can cure the problem, but I'm not convinced.
I'd take it back to Apple for an exchange but there's no stock of the 128gb cellular units at any of the stores nearby.