ZHYIHONG Android 5.1 Unlocked Cell Phones 4.5" Dual Sim GSM Quad Core White Unlocked Dual SIM smartphone, with Android 5.1 Lollipop Mediatek 6580 Quad Core 1.3 GHz Processor with arm Mali-400 GPU 4.5 Inch TFT, capacitive touch screen 480 x 854 pixels Dual cameras Front 0.3 MP Back 5.0 MP Dual SIM,RAM:512MB;ROM:4GB 3G (WCDMA 850/2100) and 2G Quad Band International Version (GSM 850/900/1800/1900) network please buy the GSM/WCDMA SIM card. Do not buy the CDMA SIM card from them.