A:AnswerThis is not a smart TV. Therefore, no, it does not come with wi-fi. If you wish to add smart features, you will have to get a Roku, Fire TV stick, or something similar.
A:AnswerThe size of the screws for the wall mount are M6 x 10 mm.
Here is the link for the Quick Setup Guide:
https://files.bbystatic.com/2lZfQITmhHjkEsRNUKSIiQ%3D%3D/NS-40D510NA21_43_20-0140_QSG_V2_EN_Final_lr.pdf
A:AnswerDo not use your TV in areas that are too hot or too cold, because the cabinet may warp or the screen may malfunction. Your TV works best in temperatures that are comfortable to you.
A:AnswerNo. Your streaming device will come with a remote. My Roku remote also controls the volume on the TV. Since I only watch streaming services and don't need to switch between inputs, I don't have any need for the TV's remote in daily use.