OnePlus X features a 5.0″ 1080p AMOLED display, a Snapdragon 801 CPU with 3GB of RAM, and the ability to use two SIMs, or one SIM plus a microSD card. The camera is 13MP sensor with f/2.2 aperture, and the front camera takes photos at 8MP with f/2.4 aperture. The OnePlus X comes with a glass back, or, in limited quantities, you can get a unit with a ceramic back. The battery capacity is 2525mAh.
OnePlus X has still not received official Marshmallow update. However, Android being open source, you can always install custom ROMs if you want latest Android version. CM 14 ROM running on Android 7.0 Nougat is available for OnePlus X. If you want to install CM 14 on OnePlus X, follow the guide below.