BLU Studio 5.0 Unlocked Dual Sim Phone--U.S. Warranty (Black) Unlocked Dual Sim 5.0-Inch WVGA Display, 1 GHz Dual Core Processor Android 4.1 Jelly Bean, 3G 850/1900/2100, HSPA 7.2 Mbps, 4GB Internal Memory, Micro SD up to 32GB 5MP Camera I 0.3MP Front, HD Video Recording 720p, Auto Focus, LED Flash Built-in Apps: Facebook, Twitter, Whatsapp, Google Search, Maps, Gmail, Youtube, Calendar, Google Talk, Google Play Store Supports Video Call 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.