Originally Posted by
kirankannan8 Hi, Go to settings > Display and Brightness and turn on Auto lock. You can set the time you want

for *everything* else, the screen does turn off automatically after 30 seconds...
unfortunately, on both my new iPhones(SE and 7), the screen does stay on indefinitely... this can be duplicated on both of my new iPhones by doing this:
(1) screen off
(2) I say "hey siri, find music in iTunes store"
(3) screen turns on and Siri responds: "here's the iTunes store"
(4) phone shows "Touch ID or Enter Passcode" screen with the number pad
unless I use my finger or passcode to unlock, the screen remains on indefinitely... but I've only dared to allow it to remain on for 57 minutes. At 58 minutes, I touched the fingerprint sensor and the screen changes to the iTunes store... then if I don't do anythnig for 30 seconds, it turns off(obviously)
I can't imagine this being too good for the battery life if I'm out and about and this happens.