Sonim XP3 Sentinel official Pictures. Sonim XP3 Sentinel is a Smartphone of sonim. The Sonim XP3 Sentinel Phone. Announced Jul 2010. Features TFT, 65K Colors Display, Philips Nexperia 5210 Chipset, 2 MP Primary Camera, 1850 MAh Battery, MIL-STD-810G Compliant, Corning Gorilla Glass. Sonim XP3 Sentinel price starts.