When you work a manual labor job, you need a smartphone that can handle the ups and downs of your day. Communication is a vital aspect of the job of construction workers, and your smartphone (just like you) should be able to perform under extreme conditions.
A tough outer shell of a case and a little water resistance is no longer enough versatility for your smartphone to remain functional through it all. Today’s designers know the tough demands of the job, and they have certainly stepped up to the plate.