Unlocked Quadband Dual Core 4.0 inch Android 4.2 Smartphone Dual SIM Dual Standby 2G Cellphone MTK6572 with WIFI Bluetooth (Red) Dual SIM Card Dual Standby Unlocked Quadband:GSM 850/900/1800/1900MHz, (2G), Works with all GSM network worldwide 1 x Phone; 1 x Earphone; 1 x Battery 1x USB Cable 1 x Charger 1 x Back Case 1 x User Manual OS:Android 4.2 CPU: MTK6572 Cortex A9 dual core, 1.2GHz 4'' Touch Screen; ROM: 256MB; RAM: 256MB 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.