My iPhone 6s has very bright colorful vertical lines
My iPhone 6s is working normally and all fine but I just got this phone a week and got randomly bright red blue and white colors who are really annoying they cover up my whole screen and if I sent this to the factory I need to pay 200$ I'm not paying for that does anyone have a simple solution maybe a youtube video just do a link or something It really needs help.
iPhone 6, iOS 12