Yes, Nokia 3.1 Plus does have a 3.5 mm headphone jack.
No. Nokia 3.1 Plus does not have the front camera LED flash but it does have the display screen flash.
Nokia 3.1 Plus is 180 grams of weight.
Nokia 3.1 has 18:9 aspect ratio with 6-inch display.
The Nokia 3.1 Plus is not the most competitive phone at its price level; not by a long shot. No matter how good it looks on the outside, it's hard to ignore just how much smoother the usage experience is with other models.
Overall, the Nokia 3.1 Plus has a vibrant display despite being of HD+ resolution, and the phone offers good battery life too. I even like the design, especially the aluminum back and soft rubberized finish.