LG Nexus 5X will be a SD808, 2GB, 5.2" FHD device running Marshmallow

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At least, that's what the Amazon India website said when it was accessible.

• 12.3MP primary camera and 5MP front facing camera
• 5.2-inch (13.2 centimeters) IPS capacitive touchscreen with 1080 x 1920 pixels resolution and 423 ppi pixel density
• Android v6 Marshmallow operating system with 1.8GHz Qualcomm MSM8992 hexa core processor, 2GB RAM, 16GB internal memory and single nano SIM
• 2700mAH lithium-ion battery providing talk-time of 17 hours on 3G networks and standby time of 300 hours on 3G networks
• 1 year manufacturer warranty for device and 6 months manufacturer warranty for in-box accessories including batteries from the date of purchase

Technical Details
OS Android
Item Weight 177 g
Product Dimensions 15.4 x 1 x 7.6 cm
Item model number LG-H791
Wireless communication technologies Bluetooth, WiFi Hotspot
Connectivity technologies GSM, (850/900/1800/1900 MHz), 3G, UMTS, LTE, WiFi
Special features Video Calls, GPS, Music Player, Video Player, Proximity sensor, Ambient light sensor, Accelerometer, eCompass, Gyroscope, E-mail
Form factor Touchscreen Phone
Weight 175 Grams
Colour Quartz White
Whats in the box Handset, Charger, Earphone and Quick Start Guide

http://webcache.googleusercontent.c...White/dp/B015ML12US+&cd=1&hl=en&ct=clnk&gl=in

Source