This device is Locked to AT&T - Therefore cannot be unlocked or used with any other carrier.Not Compatable with any other GSM Carriers such as: Walmart Family Plan H2O MetroPCS Simple Mobile Cricket.This phone is only compatable with AT&T. 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)12 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: 16GB 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