Samsung Galaxy Core Plus G3502L Unlocked GSM Dual-SIM 4G HSPA+ Phone - Black GSM 850 / 900 / 1800 / 1900 (SIM 1 & SIM 2), 3G: HSDPA 850 / 900 / 1900 / 2100, 4G: HSPA+ HSDPA 850 / 900 / 1900 / 2100 4.3" TFT Display Capacitive Multi-Touchscreen Android v4.2 (Jelly Bean), Dual-Core 1.2 GHz Processor 5 Megapixel Camera (2592 x 1944 pixels) w/ Autofocus, LED Flash + Front-Facing VGA Camera + Video Internal Memory: 4GB + microSD Slot Expandable up to 64GB 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.