I have to ask Bixby to turn screen brightness all the way up quite often which is great she does it everytime but I had purchased my s9+ in sept or around then and couple days ltr it started doing the darkness an green lines at top and i love my phone and can't afford to buy another can someone please help????
This is more like not software issue but hardware issue. Sure you can try: The first thing you should do is to power off your Galaxy S9. Leave it off for at least an hour. This method has worked for some owners. After leaving it for some minutes and then switching it on again, the lines have greatly reduced. But otherwise you need to replace screen (cable).