I took off iphone 32 GB on contract in mid December. Absolutely no problems with it apart from death grip issue. Used it for few days till I got a chance to compare mine with few of my friend's iphone 4 16 GB ones at a party. Behold, the screen on mine looked so yellow while theirs were blueish white and noticeably brighter. There after, the only thing I thought when I used my iphone was how yellow it looked. Booked genius appointment at Westfield, London. Same story, genius brought out new phone for replacement. It was a refurb but its alright. We then tested it and it was even yellower than previous one. So the genius got his manager and the manager brought out a phone from a completely different batch. Shockingly, it was also yellow. Then I just checked with a lady who was getting her iphone 16 GB replaced next to me. Her replacement unit was perfect white. The store manager saw that and authorised a brand new (not a refurb) replacement for me to be sent from China. But I still can't be sure if it will be ugly yellow or not. Just checking if anyone got chance to compare their 32GB models with 16GB ones and noticed what I did.