Apple iOS devices (iPhone, iPad, iPod) lock Screen time is not a static or developer end settings, but it’s a dynamic means you can modify it if you want ever. By default, Apple gives adequate set up according to attention on devices battery life. Even though, essentials settings you can be adjusted, for example, many users who want turn on screen/ not sleeping during device plugged-in. I don’t know, you are one of them, but probably it’s not possible, however, modify/change screen timeout on iPhone, it’s possible.
By the way, if you change the screen auto-lock time. Then, it will not turn off until once you press the power button. Even though, the following guide you can be modified iPhone auto lock screen time running iOS 11 or later.
Here’s iOS 12 Feature> How to Use Screen Time in iOS 12 on iPhone and iPad
Complete Guide to Change Screen Time Out on iPhone, iPad: iOS 11/ iOS 12 or later
Step 1. Head on Settings App on iPhone home screen.
Step 2. Scroll down the screen and Choose Display & Brightness.
Step 3. You can see now Auto-Lock option.
Step 4. Tap on Auto-Lock and Select Never from (30 seconds, 1 minutes, 2 minutes, 3 minutes, 4 minutes, 5 minutes or Never.) then go back and press the home button.
Note: Is your iPhone 7 auto lock settings stuck on 30 Seconds? Please Turn off Low Power mode in iOS 11, because in low power mode, auto-lock restricted to 30 seconds.
From now, your iPhone screen never happens auto lock. If you don’t like, then you can adjust auto-lock time again as described in above steps.
Keep Remember – if you want to save battery life, then, above type of auto-lock screen settings is very bad because it takes much battery to keeps turned Phone screen light ON. So to prevent from it, you should keep auto-lock time1 or 2 minutes only.
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