TSJYING Unlocked Smartphone with Dual Camera, 4.5 Inch, Anroid 5.1, MTK6580 Quad Core ROM, 4GB, Dual SIM, GSM/3G Quadband, WiFi Bluetooth (White) Unlocked Dual Sim Smartphone, with Android 5.1 Lollipop 4.5" FWVGA Display (480 x 854) CUP:MTK6580 Quad Core 1.3GHz ; GPU:Mali-400MP ; RAM&ROM: 512MB + 4GB ROM Dual Camera:Back-camera : 2.0MP;Front camera: 0.3MP 3G (WCDMA 850/2100) and 2G Quad Band(GSM 850/900/1800/1900) network , please buy the GSM/WCDMA SIM card. Do not buy the CDMA SIM card from them.