I must be lucky cause I came from a iPhone 3GS to iPhone 4S no 4. But I remember looking at the 4's before 4S was released. and in the store compared to my 3GS the store display of the 4 was yellow. When I purchased my iPhone 4S on the Monday after launch day at 5th Ave. NYC, I was terrified that my iPhone 4S would be yellow. But it is perfect it's just like my 3GS.