I think it's a hardware issue. Happened to an old S9 once.If you ever drop it, a small gap forms. Might not notice or cause an issue then, but later it causes the display to produce these weird green lines...That's what happened to my old phone, at l...
I believe that an upgrade is ill advised. But there are certain improvement.Some improvements:1. Processor (S888). Therefore speed and overall performance.2. Battery life. Largely due to the new power efficient chip.3.The display technology has impro...