LG Nexus 5 D821 16GB  Unlocked Smartphone (Red) GENERAL 2G Network GSM 850 / 900 / 1800 / 1900 - all versions CDMA 800 / 1900 - North America version 3G Network HSDPA 800 / 850 / 1700 / 1900 / 2100 / 900 - North America version HSDPA 850 / 900 / 1700 / 1900 / 2100 4G Network LTE 700 / 800 / 850 / 1700 / 1900 / 2100 / 2600 - North America version LTE 800 / 850 / 900 / 1800 / 2100 / 2600 SIM Micro-SIM. DISPLAY Type True HD IPS+ capacitive touchscreen, 16M colors Size 1080 x 1920 pixels, 4.95 inches (~445 ppi pixel density) Multitouch Yes Protection Corning Gorilla Glass 3. MEMORY Card slot No Internal 16/32 GB, 2 GB RAM. CAMERA Primary 8 MP, 3264 x 2448 pixels, autofocus, optical image stabilization, LED flash, Features Geo-tagging, touch focus, face detection, photo sphere, HDR, dual recording Video Yes, 1080p@30fps, Secondary Yes, 1.3 MP. FEATURES OS Android OS, v4.4 (KitKat), upgradable to v4.4.2 (KitKat) Chipset Qualcomm MSM8974 Snapdragon 800 CPU Quad-core 2.3 GHz Krait 400 GPU Adreno 330 Sensors Accelerometer, gyro, proximity, compass, barometer Messaging SMS(threaded view), MMS, Email, Push Mail, IM, RSS Browser HTML5. BATTERY Non-removable Li-Po 2300 mAh battery Stand-by (2G) / Up to 300 h (3G) Talk time (2G) / Up to 17 h (3G).