A phone case helps protect your phone from damage. This is important for extending the lifespan of your phone. Additionally, if your phone is insured, many insurance companies will examine your phone’s hardware to decide if it is eligible to be covered, and will reject devices with scratches and knicks on the corners, which happen when your phone is dropped. If your phone is in a case, you can prevent these small damages to make sure your device is fully covered by your insurance, should it ever need to be replaced.