The iPhone StandBy screen is a feature introduced in iOS 17 that turns your iPhone into an always-on display. This article explains how to use StandBy on iPhone, customize the StandBy display, and what to do if the screen doesn't turn on properly.
iOS 17: How to Use iPhone's Standby Mode
To put your iPhone in StandBy mode, lock it and start charging your iPhone as usual. Then turn it horizontally. Your iPhone's screen should automatically switch to the StandBy screen within a few seconds.
The iPhone StandBy screen feature can be turned off or turned on completely at any time. Here's how to turn off the StandBy screen.
Open the Settings app on your iPhone.