UMiDIGI CRYSTAL PRO Smart Phone OS: Android; OS ver: Android 7.0 Nougat; SIM: Nano SIM , Dual SIM , Dual Standby; CPU: MTK6750T Octa Core; Processor Speed: 1.5 GHz; Storage: 64GB; RAM: 4GB; External Storage: TF card up to 256GB; Battery: Non-removable 3000mAh; ...