Yes, Redmi 6 does have the portrait mode.
Redmi 6 is made of industrial grade polycarbonate material.
Redmi 6 comes with 5W charger.
You can record up to 1080p resolution videos with Redmi 6.
If your budget absolutely can’t exceed the Rs. 8,000 mark, go with the Redmi 6 without any concerns whatsoever.