Nokia Lumia 1020 32GB Unlocked GSM Windows Smartphone w/ 41MP Camera - Yellow - No Warranty 4.5" AMOLED Capacitive Multi-Touchscreen w/ Protective Corning Gorilla Glass 3 41 Megapixel Camera (38 MP effective) w/ Carl Zeiss Optics, Optical Image Stabilization, Auto/Manual Focus, Xenon & LED Flash+ Front-Facing 1.2 Megapixel Camera Microsoft Windows Phone 8 (upgradeable to WP8.1 Black), Dual-Core 1.5 GHz Krait Processor, Chipset: Qualcomm MSM896 Snapdragon, Adreno 225 Graphics Internal Memory: 32GB, 2GB RAM, SIM Micro-SIM 2G Network GSM 850 / 900 / 1800 / 1900, 3G Network HSDPA 850 / 900 / 1900 / 2100, 4G Network LTE 700 / 850 / 1700 / 1900 / 2100 Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.