A case is practically a requirement for the iphone 4, given the problems some models have with reception and antennas. A iphone 4 cases will improve reception and signal strength for many phones experiencing the problem. This list will help you shop for just the right iphone 4 cases for your needs. The pixel skin HD is fairy basic iphone 4 case but there’s nothing wrong with that. It does what it sets out to do very well. It protects the iphone 4 on all sides except the screen, while also providing access to the phone’s buttons and ports. It also solves the problem presented by both sides of the case being glass and thus hard to distinguish in pockets or bags now one side is covered.