BLU WIN JR  - 4.0" Windows Smartphone - US GSM  Unlocked - White Unlocked Dual Sim Windows 8.1 Smartphone 4GB Internal Storage 512MB RAM with Micro SD Slot up to 32GB Qualcomm Snapdragon 200, 1.2 GHz Quad-Core, Windows 8.1 OS 5MP Autofocus Camera with LED Flash, HD recording (720p), with VGA frontal camera GSM Quad Band 4G HSPA+ (850/1700/1900): US Compatibility Nationwide on all GSM Networks including AT&T, T-Mobile, Cricket, Metro PCS, Straight Talk and others