If you do not do any operations on your iPhone in a period of 3 minutes or 5 minutes, the screen will be off. That is when we consider that the iPhone is now in the sleep mode. But sometimes we just don't want the iPhone screen to be turned off or frequently enter the passcode or use your finger to unlock the iPhone over and over again. Here we will show you how to change it.
You can change the sleep mode on iPhone by changing the Auto-Lock period. You can set the period of time that should last before sleep mode is activated, or switch off the sleep mode completely. You have an option of up to five minutes. If you tap Never, you will be able to keep iPhone from sleeping.
Step 1. Go to Settings on your iPhone.
Step 2. Scroll down and find Display & Brightness.
Step 3. Tap on Auto-Lock and set the period for whatever you like.
Step 4. If you want to keep your iPhone from sleeping, you can set the Auto-Lock to Never.