Kyocera DuraCore E4210 official Pictures. Kyocera DuraCore E4210 is a Smartphone of kyocera. The Kyocera DuraCore E4210 Phone. Announced Jul 2011. Features 2.0″ Display, QSC6055 Chipset, 1360 MAh Battery, MIL-STD 810G-grade. Kyocera DuraCore E4210 price starts.