Why is there a black line through the camera on my iPhone 5?

There's a horizontal line on my back camera that looks like a grid. I can see it while I'm taking a picture and in all the pictures I take the line is there. This phone is 2 days old. Never dropped. Is it a crack in the camera or how can I fix it?

If this phone is only 2 days old, then check for any sticker you forgot to remove. Since being new, it is still under warranty period. Go to the same shop where you purchased this phone and explain them the trouble. You may get a positive result or they may replace it.