Batteries deteriorate over time, and as they wear down, your iPhone might shut off unexpectedly. Here’s what can cause an iPhone to turn on and off without warning, and some solutions that have been effective for us.

How to Fix an iPhone That Keeps Shutting Down

Several potential solutions are available. Follow these steps from start to finish, beginning with the easier fixes.

1. Restart your iPhone. Don’t just put it to sleep and wake it. Ensure the iPhone turns off completely. Once it’s off, hold down the Sleep/Wake button until you see the Apple logo on the screen to power it back on.

2. Check your battery health. The Battery Health section will indicate if your battery needs replacement.

   To check your phone’s Battery Health, go to Settings > Battery > Battery Health. If you see anything other than “Normal,” it might indicate that you need to replace the battery.

3. Update iOS. In rare cases where the iPhone randomly shuts off, the problem may lie with the operating system, and an iOS update could resolve it.

   We recommend plugging in your iPhone before you start the update process. If your iPhone powers down during an OS update it can be very hard to get it working again.

4. Restore the iPhone from a backup while in DFU Mode. First, back up your iPhone through your computer. Then, put your iPhone into DFU Mode and restore it from the backup you just made.

5. Contact Apple for a battery replacement. If none of the previous steps resolve the problem, it’s likely a battery issue. The battery might be defective or at the end of its lifespan.

   Apple is your best option for assistance, so contact Apple Support.

Causes of an iPhone that Keeps Turning On and Off

There are several reasons your iPhone is turning off:

• The battery is no longer able to hold a charge and needs replacing
• The phone has been damaged by water
• An app is causing some conflict