What kind of material should I choose for my iPhone 4S case?

For protection against scratches and cosmetic damage, a hard plastic shell is a good choice. A case made from rubber or flexible skin helps to absorb the shock if you drop the device, providing moderate protection. For maximum protection, opt for a heavy-duty case that offers complete safety against most kinds of shocks.

What type of case should I get for my iPhone if I exercise?

Opt for an armband if you want to listen to music while running or working out. These cases offer a good level of protection against scratches and shocks as well as moisture protection.

Do iPhone 4S cases come with screen protectors?

Most models come with a clear, adhesive film that protects the screen against scratches. You can also buy screen protectors separately if you want extra features such as an anti-glare finish.