The infamous Nokia 3310 was considered an indestructible phone (as long as you don't drop-kick it). However, phones–and arguably a lot of other products–are not as durable these days. The lack of durability is because they are thinner and have more fragile technology inside them. As a result, phone cases are generally crucial to keeping your phone safe. That being said, the XR20 is very durable as it is made and tested to military standards. It is an excellent phone if you are accident-prone.