S21 FE got new grid lines after updations

[Sks1992]

Got lines for each updating in Samsung S21 FE .  who is responsible for this issue. need solution for this  

[Sks1992]

Ha bro my phone is purchased fro newzealnd and they said if compalint happen they a have no policy to repair in indai the policies are differentin international and domestic purchase. but the company is same 🫢