BLU Dash JR 4.0K Android 4.2, 2MP - Unlocked (Black) 4.0" Display (480x800): 2MP Camera with LED Flash, HD Video recording (720p) 512MB Internal Storage 256 MB RAM with Micro SD Slot up to 32GB Unlocked Dual SIM Phone; 2G 850/900/1800/1900 1.3 GHz Dual-core Processor, Android V4.2 Jelly Bean (Upgradeable to v4.4 Kit Kat) 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.