Samsung GT-I9500 Galaxy S4 16 GB - Unlocked (White) 2G: 850 / 900 / 1800 / 1900 3G: 850 / 900 / 1900 / 2100 DISPLAY: Super AMOLED capacitive touchscreen, 16M colors.|1080 x 1920 pixels, 5.0 inches (~441 ppi pixel density).|Corning Gorilla Glass 3|TouchWiz UI Camera: 13 MP, 4128 x 3096 pixels, autofocus, LED flash (Primary)|2 MP,1080p@30fps, dual video call(Secondary) OS: Android OS, v4.2.2 (Jelly Bean) Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.