Design and Build: Uncompromising Ruggedness The Ulefone Armor 23 Ultra epitomizes toughness with military-grade credentials (MIL-STD-810H) and IP68/IP69K ratings. Its angular, aggressive chassis features reinforced rubber bumpers, a textured polycarbonate back, and stainless steel corners engineered to absorb impacts from 1.5-meter drops. At 12.5mm thick and 332g, it’s substantial but ergonomically sculpted for grip. Physical