The physical entity of the iPhone is also incredibly sensitive. Avoid shaking the iPhone as this has a negative effect below its hood. If you are using it during physical activity, such as jogging, try to hold it to reduce movement. The touch screen is very sensitive. This makes it prone to scratches and cracking. If you can, you should by a clear cover to reduce the damage that may occur. Find a protective shell that addresses both the touch screen and the back of the phone.