This Quad-core smartphone with 4.5 inch capacitive touch screen is based on Android 4.2 operating system and MTK6589 Cortex A7 Quad-core CPU, stable and high performance. 1GB RAM, 4GB Nand Flash, support external TF Card / Micro SD card up to 32GB. Dual cameras: 2.0 Megapixel front camera; 13.0 Megapixel rear camera with flashlight. It supports 802.11 b/g/n WiFi, Bluetooth 4.0, G-Sensor, etc. And buy this Gusun JY809 4.5" GSM Smartphone Dual SIM Android 4.2 MTK6589 Quad-Core 1GB + 4GB 2.0MP/13.0MP Camera Now $103.99.