As per the post on TENAA, the Lenovo Vibe X3 has Snapdragon 808 processor, 3GB RAM, Android 5.1.1 Lollipop operating system and has a a 5.5-inch full-HD display.

The phone has a 21-megapixel rear camera with dual-LED flash and an 8-megapixel front camera, the post further revealed. It measures 154x76.4x9.4mm and weighs 175 grams.
 
Designed by Motorola which Lenovo took over few months ago, kept the smartphone very handy to use. Meanwhile, the  latest buss around is that Lenovo might launch a stripped down version of the phone as X3 Lite with less powerful processor, battery, a 13 megapixel camera but with the same 5.5 inch display.