https://www.gsmarena.com/zte_nubia_z18_mini-9161.php

The Nubia Z18 mini is built around a
5.7-inch 2160x1080px 18:9 IPS LCD
side of an aluminum frame.
Snapdragon 660 chipset,
6GB of RAM,
 a 24MP f/1.7 + 5MP dual camera at the back and an 8MP f/2.0 front-facing unit with an 80-degree wide angle field of view.
148mm (même taille que ton S8)

300€
environ plutôt un bon rapport qualité/prix