This device is compatible with all GSM Carriers Worldwide (i.e. carriers that use a SIM card) such as AT&T & T-Mobile in the U.S.Additional GSM Carriers include: Walmart Family Plan, H2O, MetroPCS, Simple Mobile, Cricket.This phone WILL NOT WORK with any CDMA Carriers such as Verizon Wireless, Sprint, Boost Mobile, US Cellular.4.7-inch LED-backlit IPS LCD Capacitive Touchscreen, 750 x 1334 pixel resolution with Ion-strengthened Glass, Oleophobic CoatingiOS, Chipset: Apple A8, Processor: Dual-Core 1.4 GHz Typhoon (ARM v8-based), GPU: PowerVR GX6450 (Quad-Core Graphics)8 Megapixel Camera with f/2.2, 29mm, phase detection autofocus, dual-LED (dual tone) flash, 1/3" sensor size, 1.5 µm pixel size + 1.2 Megapixel Front Camera with f/2.2, 31mm, 720p@30fpsInternal Memory: 128GB, 1GB RAMWLAN: Wi-Fi 802.11 a/b/g/n/ac; BT: 4.0, A2DP, LE; NFC: Yes (Apple Pay Only); USB: 2.0, Reversible ConnectionNon-Removable 1810mAh Lithium Polymer CapacityDimensions: 5.44 x 2.64 x 0.27 inches, Weight: 4.55 oz