Caterpillar is a brand millions of construction and government workers know very well. Their construction machinery speaks for itself, and over the years the company has started offering some pretty great smartphones too.
The CAT S60 is rugged, durable, waterproof and has a few neat features that no other phone can offer. In fact, it's the first smartphone with a FLIR thermal imaging camera. The company details using this imaging camera to monitor expensive machinery, check for gaps in housing construction, find electrical faults, and of course it works at night. You can take photos or video with the thermal imaging camera on the S60.
That aside, this phone has a lower-end 4.7-inch HD display, decent specs, a 13 megapixel camera, 32GB of storage and supports a microSD card for expansion. You can use it all day thanks to a big 3,800 mAh battery, and water isn't a problem either.
CAT claims this is the most water-resistant phone around. Stating it's capable of surviving depths of 5 meters for over an hour. Additionally, it has the same military grade drop, shock and temperature ratings. Drop it from 1.8 meters and don't even worry about the screen getting cracked thanks to the die-cast frame. It works on AT&T, T-Mobile, and most smaller GSM carriers. Don't expect it to work on Verizon.