[Solved] How to Fix iPhone Won't Turn on After iOS 18 Update?

Many users have encountered iPhone won't turn on after iOS 18 update. This situation can be very distressing, especially when you urgently need to use your phone. Fortunately, we have some methods to help you resolve this issue. Next, we will analyze the causes in detail and provide effective solutions to help you get your iPhone back to normal working condition.

Part 1. Why iPhone Won't Turn on After iOS 18 Update?

The issue of "iPhone not working after update" can be caused by several factors, and understanding these reasons can help you choose the appropriate fix. Here are some possible causes:

• Battery depletion: The device may have consumed a lot of power during the update, leading to it not turning on afterward. (iOS 18 battery drain?)
• System update failure: If some files were corrupted or not fully installed during the iOS 18 update, it could prevent the iPhone from starting up.
• Incompatibility with hardware: If the iPhone is an older model, it may have compatibility issues with the new iOS version, causing the device not to boot.
• Other unknown software or hardware issues: This could be related to system bugs in iOS 18 or hardware damage.

Part 2. How to Fix iPhone Won't Turn on After iOS 18 Update

After we know the possible reasons, here are six fixes you can try to solve the issue. Let's look at them one by one.

Fix 1. One-click to Fix iPhone Not Turning on After Update

If your iPhone is updated and now won't turn on, the easiest solution is to use a professional iPhone repair tool like iOS System Recovery. This software can easily help you fix various system issues with your iPhone, including the iPhone not turning on after the update to iOS 18, without worrying about data loss.

Key features of iOS System Recovery:

• One click to repair the iPhone won't turn on after the update.
• Easily fix issues such as the iPhone won't restore, black/green/red/blue/yellow screens of death, or being stuck in recovery/DFU/headphone mode.
• You can also downgrade from iOS 18 to iOS 17 for free.
• Compatible with most iPhone models, including the latest iPhone 16 series (iOS 18 supported).

Free Download for PC

 

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Here is how to fix iPhone not turning on after update iOS 18 using iOS System Recovery:

Fix 2. Charge the iPhone

Sometimes, the simplest reason for an iPhone to update and not turn on is a depleted battery. In this case, charging the device can help it restart.

To do this, follow the steps below:

Step 1. Use an original Apple charger and cable to connect your iPhone to a power source.

Step 2. Charge it for at least 15-30 minutes to ensure the device gains enough power.

Step 3. During charging, press and hold the power button to see if the device will start.

If the iPhone still doesn't respond after some time, the issue may not be related to the battery, and it's advisable to try other methods.

Fix 3. Force Restart the iPhone

Another solution is to perform a force restart. This can often fix minor software glitches that might be preventing your iPhone from starting up normally.

The method varies slightly for different iPhone models:

• iPhone 8 and later: Quickly press and release the "Volume Up" button, then quickly press and release the "Volume Down" button, and finally, press and hold the "Power" button until the Apple logo appears.
• iPhone 7/7 Plus: Press and hold the "Volume Down" button and the "Power" button at the same time until you see the Apple logo.
• iPhone 6 and earlier: Press and hold the "Home" button and the "Power" button simultaneously until the Apple logo appears.

Fix 4. Restore iPhone Using Recovery Mode

If a force restart doesn't work, you can try using recovery mode to reinstall the iOS system. This method will erase all data on the iPhone, so it's recommended to back up your iPhone beforehand.

To do this, follow the steps below:

Step 1. Connect your iPhone to your computer and open iTunes or Finder.

Step 2. Put your iPhone into recovery mode:

• iPhone 8 and later: Quickly press the "Volume Up" button, then quickly press the "Volume Down" button, and then press and hold the "Side" button until you enter recovery mode.
• iPhone 7/7 Plus: Press and hold both the "Side" button and the "Volume Down" button until the recovery mode screen appears.
• iPhone 6 and earlier: Press and hold both the "Side" button and the "Home" button until you see the recovery mode screen.

Step 3. iTunes will now detect your iPhone and inform you that it needs to be updated or restored. To resolve the issue of your iPhone won't turn on after update iOS 18, click the "Restore" button directly.

Fix 5. Put the iPhone into DFU Mode

If recovery mode doesn't work, DFU mode is a deeper recovery option that can help resolve more complex system issues.

Here is how to do it:

Step 1. Connect your iPhone to your computer and open iTunes or Finder.

Step 2. Put your iPhone into DFU mode:

iPhone 8 and later:

• Quickly press the "Volume Up" button, then quickly press the "Volume Down" button, and then press and hold the "Side" button until the screen goes black.
• Next, hold the "Side" button and the "Volume Down" button together for 5 seconds, release the "Side" button, and continue holding the "Volume Down" button.

iPhone 7/7 Plus:

• Press and hold both the "Side" button and the "Volume Down" button for 10 seconds, then release the "Side" button while continuing to hold the "Volume Down" button.

iPhone 6 and earlier:

• Press and hold both the "Side" button and the "Home" button for 10 seconds, then release the "Side" button while continuing to hold the "Home" button.

Step 3. Follow the prompts on the screen to restore your device.

Fix 6. Contact Apple Support

If your iPhone still doesn't turn on after trying all the above methods, it may be a hardware issue or a system fault that cannot be self-repaired. In this case, the best option is to contact Apple Support or visit an authorized Apple service center for assistance.

Words in the End

While it can be concerning if your iPhone won't turn on after updating to iOS 18, the repair methods outlined above, especially using iOS System Recovery, can help you easily fix system issues and restore normal functionality. If the problem persists, be sure to contact Apple Support promptly to ensure your device receives professional repair and assistance.

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