[1] The rear-facing camera of the Xperia XA Ultra is 21.5 megapixels with sensor size of 1/2.4 inch, featuring Sony Exmor RS IMX258 image sensor with quick launch and also features hybrid autofocus that utilizes phase detection autofocus that can focus the object within 0.03 seconds.
The front-facing camera also features an LED flash and optical image stabilization (OIS).
[2] The Xperia XA Ultra is preinstalled with Android 6.0.1 Marshmallow with Sony's custom interface and software.
[3] On August 23, 2016, Sony announced that the Xperia XA Ultra would receive an upgrade to Android 7.0 Nougat.
[5] Here are the complete description of the Xperia XA Ultra variants in the world: GSM GPRS/EDGE 850, 900, 1800, 1900 MHz