iPhones are major purchases given their high cost and frequency of usage. People who have one must take care of it in order to make it last. Cases are vital to longevity. Accidents will sometimes happen and you want to make sure that the phone survives.
By shielding it with a case, the unit is less likely to have cracked screens and water damage. Its edges are going to be free from dents and scratches. Not only will you be able to use it for longer, you can also sell it at a higher price later on because of its pristine condition.
Look for a quality iPhone case supplier for peace of mind. You may also resell these cases and earn a good bit of money. They come in a wide range of colors and designs. Specific cases are available for each model.