Nokia X Dual Sim , 3MP, 4GB, 3G, Jelly Bean Factory Unlocked World Mobile Phone - White 2G: GSM 850 / 900 / 1800 / 1900 (SIM 1 & SIM 2), 3G: HSDPA 850 / 2100 4.0-inch IPS LCD Multi-Touchscreen w/ Nokia X platform 1.0 U Android v4.1.2 (Jelly Bean), Dual-Core 1 GHz Cortex-A5 Processor, Chipset: Qualcomm MSM8225 Snapdragon S4 Play, Adreno 203 Graphics 3.2 Megapixel Camera (2048 x 1536 pixels) + Video 480p@30fps Internal Memory: 4GB, 512 MB RAM + microSD Slot Expandable up to 32GB 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.