Sony Ericsson Xperia ray ST18a Unlocked Android Smartphone with 8 MP Camera, Wi-Fi, Bluetooth, and GPS--U.S. Warranty (Black) Network: GSM/GPRS/EDGE 850/900/1800/1900. UMTS/HSPA 850/1900/2100. Platform: Android 2.3 Internal phone storage: Up to 300MB free. RAM: 512MB. Memory card slot: microSD, up to 32GB (4GB card included) Camera: 8.1 MP, Digital zoom - up to 16x, Aperture - f/2.4, Auto focus, Geo tagging, Front-facing camera (VGA), Red-eye reduction, Flash / light type, Video light, Video stabilizer, Smile detection, Face detection, Sony's Exmor R for mobile CMOS sensor Keyboard - Onscreen 12 key and QWERTY, Reality display with Mobile BRAVIA Engine, Touchscreen, Auto rotate Synchronization - Exchange ActiveSync, Google Maps - with Street View, WiFi, USB mass storage, 3.5 mm audio jack, DLNA Certified, Bluetooth technology, aGPS, Micro USB support