Running 11.2.6. I have to manually turn up the screen brightness several times a day because the phone periodically and automatically turns the brightness down on its own. I do not know how to command the phone to stop doing this. Also, emails received and read never self delete after a period of time (say one week). How do I get them to self delete after a given amount of time? I tried using the forums Search function to get answers to these questions, but only found answers that were applicable to the iPhone X.