If your iPhone is in Low Power Mode, the option to change Auto-Lock will be grayed out.
This is because part of Low Power Mode is to lock the Auto-Lock function at 30 seconds.
If you need to stop your screen from going to sleep, setting Auto-Lock to a longer amount of time is the solution.
Why is my auto lock greyed out?
If the Auto-Lock options is greyed out on your device, too, that’s because your iPhone is in Low Power Mode. “When in Low Power Mode, Auto-Lock is restricted to 30 seconds” to help conserve power, according to the official description which appears when the device is in Low Power Mode.
How do I change my auto lock when it wont let me?
3. How to Fix Grayed-Out Auto-Lock Setting on iPhone
- Open Settings on iPhone.
- Tap Battery.
- Toggle Off Low Power Mode. It’s now fixed.
- Navigate back to Auto Lock in Display & Brightness (depending on your iOS) and freely change the Auto-Lock time.
Why can’t I change my auto lock on iPhone 8?
If you experience this, it is likely that your device is in Low Power Mode to help save battery life. In Low Power Mode, Auto-Lock is set to 30 seconds. To fix this, simply turn off Low Power Mode by going to Settings > Battery > and toggle off Low Power Mode. You can easily change the auto-lock settings.
How do I change auto lock on iOS 12?
To make sure your iPhone apply the auto-lock setting, it’s suggested to re-enable it. On your iPhone, go to Settings > Display & Brightness > Auto-Lock. Select Never and go back. Then go to Auto-Lock again and select the timer you want to set for your iPhone.
Photo in the article by “Wikimedia Commons” https://commons.wikimedia.org/wiki/File:Nuki_Smart_Lock.jpg