Select This is My device or This is My Childs device. Tap Turn On Screen Time. Apple Ios 12 Screen Time Feature All You Need Know Iphone App Development Screen Time Iphone Apps You can set the period of time that should last before sleep mode is activated or switch off the sleep mode completely. How to change screen time on iphone 7 . This is useful if you want to keep your phon. Then go to General and browse for the Auto-Lock option. Click Options in the lower-left corner. You have an option of up to five minutes. Click Change Passcode then click Forgot Passcode. You can change the sleep mode on iPhone by changing the Auto-Lock period. Tap on General Select on Auto-Lock. Enter the old passcode then enter the new passcode twice for the change to take effect. This video shows how to change the time required for the iPhone 7 or 7 to lock its screen when not being used. Customize your Home Screen wallpaper with a favorite photo add widgets to keep important