Why do I have marks on my screen every time I open a darker page/app?
My phone recently went in for repair as it wasn't reading Sims, it came back afew days ago and I noticed marks in my screen on dark apps/pages. What does this mean and What should I do?
2 
Can you please post pictures of the issue? There are several possible reasons why that is happening.
Devnol さんによる
Maybe you received a refurbished phone back different from the one you sent, could depend a lot on the repair service. Pictures would helps as stated above.
Nicholas Pratt III さんによる