This is phone I saw with Android version 8.1 I am saying that I saw it first may be some other phone has it but I don't know of them.
This phone is great in look as well as in it's features. This phone has a great management for the battery. One thing that is most prominently shown by every web and reviews is "Larger Receiver Volume" this allows you to hear voices more clear. With the price really small its just $147

Specs

CPU : Quad-Core (4 x 1.5 Ghz Quad Core Cortex-A53)
Chipset : MT6739
Size : 5.5 Inches
Resolution : 720 x 1440 Pixels (~295 PPI)
OS : Android V8.1 Oreo
Main Camera : 13 MP with LED
Front Camera : 5 MP With also LED
Price : $147