Summary: Smart Phone OS: iOS; Smart Phone OS ver.: iOS 7, upgradable to iOS 7.1.2, upgradable to iOS 8.1; Shape: Bar; SIM: Nano-SIM; Processor Speed: Dual-core 1.3 GHz; Internal Storage: 8GB; RAM: 1 GB; External Storage: None; Battery life: Talk time: Up to 10 hours on 3G, Standby time: Up to 250 hours, Internet use: Up to 8 hours on 3G, up to 10 hours on LTE, up to 10 hours on Wi-Fi; Screen Size: 4 inch (diagonal): 326 ppi; Resolution: 1136x640; Touch Screen: yes; Screen Type: IPS TFT (L ...