To set up auto shutdown in iPhone, iPad or iOS 8, you can refer to the following instruction.
Step 1: Open Clock.
Step 2: Click Timer on the bottom-right corner.
Step 3: Tap Radar.
Step 4: Choose Stop Playing, and hit Set.
Step 5: Manually set the time of this timer, and click Start.
When the countdown of this timer ends, the iPhone or iPad will automatically shut down.
Tip: To undo the auto shutdown, click Cancel.
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