What is the quality of the phone itself?
Interesting question, what do you mean by quality? Specs?
This is what I can found.
The device will also boast of a 5.65 inch screen, fingerprint sensor on the side, 6GB of ram and 128GB rom, the Qualcomm® SnapdragonTM 660 Mobile Platform. XPhone will have a 16 megapixel front camera and 48 megapixel rear camera. The capacity of its battery is 3500 mAH.
Link:
https://medium.com/functionx/xphone-mwc19-new-design-and-specifications-