A8 Smartphone IP68 Android 4.2 MTK6572W SOS Power Bank 3000mAh Battery - Black 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. Quad Core, Dual Sim. RAM:1GB, ROM:8GB. IP68 Waterproof. Rear Cmera: 5.0 Mega pixel. Android: 4.4.2(32-bit)