always-on display always on

Alwaus On feature is avaialble only On iPhone 14 Pro, iPhone 14 Pro Max, iPhone 15 Pro, and iPhone 15 Pro Max, the Always-On display setting allows a dimmed version of your Lock Screen to stay visible, even when your iPhone is locked

The Always-On display setting is on by default on those models. To turn it off, go to Settings > Display & Brightness, then turn off Always On Display. Tip: When Always-On display is turned on, you can choose whether to show your wallpaper or notifications on your Lock Screen.

Keep the iPhone display on longer - Apple Support

On iPhone 13 models

Change when iPhone automatically locks

Go to Settings > Display & Brightness > Auto-Lock, then choose a length of time.

Keep the iPhone display on longer - Apple Support (IN)

1. Is this your corporate iPhone? Then please contact the system administrator of your corporate
2. If it is your personal device, in that case, do you have any profile installed by your corporate/organisation/enterprise/School Management?
   1. Erase the profile added by you If you have installed a profile on your own --> Install or remove configuration profiles on iPhone - Apple ...
   2. Or please contact the system administrator of the organisation who provided the profile to you
3. If you want to turn on SSL trust for that certificate, go to Settings > General > About > Certificate Trust Settings. Under "Enable full trust for root certificates," turn on trust for the certificate. Apple recommends deploying certificates via Apple Configurator or Mobile Device Management (MDM). --> Trust manually installed certificate profiles in iOS and iPadOS ...