Another common iPhone 4 problem is that there is a yellow tint that lacks the luster of the actual retina display for the iPhone 4. A number of iPhone users who bought the phone early realized that their phone came with a yellow discoloration of the screen. The discoloration was noticed either in blotches across the screen or in bands. Either way, the iPhone 4 did not look as enticing as it should with this kind of discoloration.
For most users, simply using the phone as usual cleared up the yellowness of the screen and returned the original resolution, and brightness. Users who found the problem to stick to their phones are able to ask for replacements while the phone is under warranty.