Remember that excitement we mentioned about the Caterpillar B15? It inspired us to go through the available options and rank the best smartphones available for construction work. We took price, features, operating system and apps into consideration along with toughness to help construction professionals pick the perfect smartphone. In the end, the smartphone countdown turned out to be our most-read story of 2013. Be sure to check out the countdown by clicking here. We think the winner might surprise you.