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 pixels with Ion-strengthened glass Oleophobic CoatingiOS Apple A9 Chip Dual-Core 1.84 GHz PowerVR GT761212 Megapixel f/2.2 aperture 29mm lens Simultaneous 4K Video and 8MP Image recording + 5 Megapixel Front Camera with f/2.2 aperture 31mm Lens and HDRInternal Memory: 64GB 2GB RAMNon-Removable Lithium Ion 1715 mAh BatteryDimensions: 5.44 x 2.64 x 0.28 inches Weight: 5.04 oz