The phone I received also had the most abysmal white balance in poor light, even at close range with the flash. Skin tones were DARK yellow, white walls looked yellow, it was the pits. My phone also had the yellow blotches on the screen, so I took it in to the store and exchanged it. The new phone has MUCH better white balance, so I can confirm that not all phones have the problem.
My original phone also only displayed the problem with the back camera, the front one was fine. Now I am hoping they don't make a change in the software in future, because my camera is fine, as is. I don't want blue whites going forward. :-/