iRULU U1 Pro Octa-core 3G Smartphone - 5 Inch HD Screen Dual SIM Card Android 4.4 KitKat OS, Front 5MP/ Back 13MP Camera 720*1280 Resolution - White IRULU U1pro is an unlocked phone which is compatible with GSM and WCDMA carriers like AT&T and T-Mobile as well as with GSM or WCDMA SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). It will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin. Frequency for reference 2G: GSM 850/900/1800/1900; 3G: WCDMA 850/1900/2100. No contract phone with dual SIM slots, one for work and another one for personal connection. Work and life gonna be switched as you wish The 13 Mp/5 Mp HD camera auto focus with flash light means you will be taking the best photos around. No more embarrassing shots from a poor camera 5 inch large QHD IPS touchscreen, very suitable for watching live TV shows or sport games. Installed with Bluetooth 4.0, Wi-Fi 802.11 b/g/n, and GPS & AGPS. Locating the world anytime you wanted to. One pcs of 2000mAH Li Battery, standby about 120h, and play video about 5h. Talk Time about 120-150mins