How i can repair my mobile on display white line peoblem

Yes now my m51 also display flickering issue found but in service center's most of fraud making and they don't now the mobile work worst fellows.

Hi yakshikaHwru

Hi sir Gud morningSamsung m51 auto restart and display flickering problem solution pleaseAnd other question plzCan I update the update plzzzAbout 398mb soft ware update in this update so many problems plzzz reply answer sir