Nokia Lumia 830 RM-985, 16GB, Factory Unlocked, US Warranty (White) LTE FDD network: Band 17 (700MHz), Band 2 (1900 MHz), Band 4 (1700/2100 MHz), Band 5 (850MHz), Band 7 (2600 MHz) 3G WCDMA network: Band 1 (2100 MHz), Band 2 (1900 MHz), Band 5 (850 MHz), Band 8 (900 MHz) Mass memory: 16 GB RAM: 1 GB Maximum memory card size: 128 GB Expandable memory card type: MicroSD 5 '' Display HD720 (1280 x 720) Display technology: ClearBlack, IPS LCD Pixel density: 296 ppi Display features: Brightness control, Sunlight readability enhancements, Corning Gorilla Glass 3, Easy to clean, High brightness mode, Lumia Color profile, Wide viewing angle SnapdragonTM 400 Number of cores: Quad core Clock rate: 1200 MHz Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20 and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.