This year’s Mobile World Congress played host to plenty of phones I couldn’t stop playing with, and the $599 Caterpillar-branded Cat S60 was near the top of my list. First, though, a painfully obvious disclosure: I have never, nor do I currently, work in construction. I’m not an outdoorsman either, and I’m a terrible amateur plumber. That makes me half a lousy test subject here. Bullitt Group, the UK-based phone maker that licenses the Caterpillar brand, is targeting people working in trades, as well as folks who are generally just rough on their phones. I’ve definitely fallen into the latter camp on occasion, but either way, there’s more to the S60 than just how hardy it is.