Similar to all of Apple's products, the iPhone 4 stayed true to the original iPhone styling, in fact, it looks very similar to the iPhone original with only a few slight differences. iPhone 4 actually took the device to a more boxy style, which made it more durable. This made the screen less likely to crack and develop damage, so screen damage is not quite as common with the iPhone 4. However, problems like dock connector repair services, headphone socket replacement services and iPhone 4 factory unlocking are widely needed for the iPhone 4. A lot of people want to unlock their iPhone 4 because this allows them to download applications and games that are outside of the Apple iTunes library.