Unless it's done buy an authorized Apple service centre the True Tone doesn't work, I didn't realize what a hassle not having True Tone is until I didn't have it. I was charged $600 to replace my screen just to find out Apple only charges $400, I got my old screen back swapped the screens, taking the screen back to the repair place and taking my phone in to get the screen swapped properly. Was pretty !#^&@@ off when I found all this out.