The Sonim XP Pro looks every bit the rugged device it’s meant to be. Measuring 6.73 by 3.15 by 0.47 inches (HWD) and weighing 9.77 ounces, it’s lighter than the $569.99 Sonim XP10 (6.3 by 3.0 by 0.6 inches, 11.3 ounces) but taller and thicker than the Galaxy XCover6 Pro (6.65 by 3.15 by 0.39 inches, 8.29 ounces).

(Credit: Iyaz Akhtar)

Gorilla Glass Victus 2 protects the front panel, and the phone’s overall construction feels solid and sturdy in the hand. There is no flex to the device, and its rubbery back surface provides a good grip. The screen is surrounded by a sizable bezel with a large chin to help protect against drops. Sonim makes a notable design shift by sealing in the XP Pro's battery. Older Sonim phones featured user-replaceable batteries.

The XP Pro is built to survive extreme environments—it’s rated IP68 and IPX9K, meaning it’s not only dust-tight and water-resistant, but it can also withstand high-pressure water jets and full submersion in up to 6.5 feet of water for 30 minutes. Sonim says the phone meets MIL-STD-810H certification for durability. It can survive 6-foot drops onto concrete, operates in temperatures ranging from -4 to 131 degrees Fahrenheit, and handles lots of physical abuse, such as shock and vibration. The XP Pro is also chemical-resistant and can be disinfected using bleach or rubbing alcohol, so it's ready for exposure to dangerous workplaces, such as labs.