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.5.5-inch LED-backlit IPS LCD Capacitive Touchscreen 1080 x 1920 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)13 Megapixel Camera with f/2.2 29mm phase detection autofocus dual-LED (dual tone) flash OIS 1/3 sensor size 1.5 µm pixel size + 1.2 Megapixel Front Camera with f/2.2 31mm 720p@30fpsInternal Memory: 16GB 1GB RAMWLAN: Wi-Fi 802.11 a/b/g/n/ac dual-band hotspot; Bluetooth: v4.0 A2DP LE; GPS: Yes with A-GPS GLONASS; NFC: Yes (Apple Pay Only); USB: 2.0 Reversible ConnectorNon-Removable Lithium Polymer 2915 mAh BatteryDimensions: 6.22 x 3.06 x 0.28 inches Weight: 6.07 oz