Samsung Galaxy Ace 4 Lite DUOS G313ML/DS Unlocked GSM HSPA+ Dual-SIM Android Smartphone - White Internal Memory: 4GB, 512 MB RAM + microSD Slot Expandable up to 64GB 3 Megapixel Camera (2048 x 1536 pixels) This device is Carrier-unlocked and may be used with any GSM carrier that uses a frequency or band that this device supports. A SIM card and service plan must be purchased separately. Unlocked GSM phones will not work with CDMA networks like Boost, Sprint or Verizon 4" TFT Display Capacitive Multi-Touchscreen Android v4.4.2 (KitKat), 1.2 GHz Single-Core Processor Dual SIM GSM 850/900/1800/1900, 3G: HSDPA 850/1900/2100, 4G: HSPA+ 850/1900/2100 (not LTE) 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.