Hi, After downloading the first PB of iOS11 on my 6S Plus I noticed the screen was substantially darker. Today I am running the latest PB and the screen seemed rather dark ( outside at the time). I did an experiment and turned off auto-brightness on that phone and iPhone 6 Plus running iOS 10 and set both to max brightness. The iPhone 6 is easily twice as bright as the 6. Is this a phone or OS issue? Thanks --- Post Merged, Aug 14, 2017 --- Oops I found it. Some how when installing iOS11 Reduce White Point was activated.