Samsung Galaxy S5 SM-G900A 16GB (AT&T) 4G LTE + Unlocked GSM Smartphone - Black Technology: 4G LTE Built-in Storage: 16GB Operating System: Android 4.4.2 KitKat Mobile Frequencies: GSM 850 / 900 / 1800 / 1900 MHz Data transfer: GPRS, EDGE, HSDPA, LTE, Wi-Fi Compatible Carrier & Service: AT&T Form Factor: Smart Phones Touch Screen: Capacitive touchscreen |