After disconnected a call all of sudden a green vertical line came in to my s9 plus mobile I just cont understand why it happened I guess it isa software issue please samsung do me a needful .Couple of days I got a software update, but the problem is...

After disconnected a call all of sudden a green vertical line came in to my s9 plus mobile I just cont understand why it happened I guess it isa software issue please samsung do me a needful 

Hi I am using Samsung s9plus 128gb since 1 year really the processor is very smooth and lag free and the camera is awesome especially the selfie camera is very nice after the software updation and the looking so premium, want to update for s10plus th...