A:Answer You won’t have to turn up your brightness for overall performance. You will have to turn up your brightness when you’re scanning codes/ barcodes. For example, at starbucks you’ll need to turn up your brightness in order for the barcode to scan your member ID. Most of the time iphone will do it automatically. However, if you are showing a pic to a friend you’ll want to turn up the brightness as you move the phone side to side it will turn dark. A lot of people have a hate/ love relationship with this. I think the screen protector is just doing what it says it will. I hope this was helpful. :)