Apple has released iOS 27.0.1, the first bug-fix update for iOS 27, just two weeks after the operating system launched. The update addresses three issues affecting iPhone users, including two bugs specifically reported on the iPhone 18 Pro and iPhone 18 Pro Max.
Although iOS 27.0.1 isn’t a major feature update, it is an important maintenance release for affected devices. Apple has addressed an unexpected restart issue related to Face ID, a camera problem that could produce color artifacts when shooting at 2x zoom, and a touchscreen problem that could occur when using Control Center and Notification Center at the same time.
Here’s everything you need to know about iOS 27.0.1, including what’s fixed and how to install the update on your iPhone.
What’s New in iOS 27.0.1?

Unlike a major iOS release, iOS 27.0.1 doesn’t introduce new features or a redesigned interface. Instead, Apple is focusing entirely on fixing bugs that appeared after the release of iOS 27.
The update addresses three specific problems:
- An unexpected restart triggered by a Face ID authentication failure on some iPhone 18 Pro models.
- A camera color artifact affecting certain 2x zoom photos on the iPhone 18 Pro and iPhone 18 Pro Max.
- A touchscreen responsiveness issue involving Notification Center and Control Center that could affect any iPhone running iOS 27.
Face ID Bug Could Restart Some iPhone 18 Pro Models
One of the more serious fixes in iOS 27.0.1 affects the iPhone 18 Pro and iPhone 18 Pro Max.
On a limited number of affected devices, an unsuccessful Face ID authentication could cause the iPhone to unexpectedly restart.
Face ID failures are normally handled by asking the user to authenticate again or enter their passcode. A system restart is obviously not expected behavior, so Apple has addressed the underlying software problem in iOS 27.0.1.
Apple says the issue affected only certain devices rather than all iPhone 18 Pro models.
If you’ve experienced unexplained restarts shortly after Face ID failed on an iPhone 18 Pro or 18 Pro Max, installing iOS 27.0.1 is therefore particularly relevant.

iPhone 18 Pro Camera Bug Fixed
The second iPhone 18 Pro-specific fix involves the camera.
Under certain lighting conditions, photos taken using 2x zoom at f/1.48 could display an unwanted color artifact.
The problem wasn’t present in every photograph or on every device. Apple says only a small number of iPhone 18 Pro and iPhone 18 Pro Max units were affected.
Because the problem was related to specific shooting conditions, it could easily go unnoticed unless you regularly use the 2x zoom setting in challenging lighting.
With iOS 27.0.1 installed, Apple has corrected the issue.
If you’ve noticed strange color patches or other unexpected artifacts in photos captured with the 2x camera mode, updating your iPhone is worth doing before troubleshooting the camera hardware itself.
iOS 27.0.1 Also Fixes an iPhone Touchscreen Problem
The third fix applies more broadly to iPhones running iOS 27.
In certain circumstances, opening Notification Center and Control Center at the same time could cause the touchscreen to stop responding.
That could make the iPhone appear temporarily frozen even though the system itself was still running.
The problem was particularly inconvenient because the user could lose the ability to interact normally with the screen until the interface recovered.
Apple has now corrected the issue in iOS 27.0.1.
Because this bug isn’t limited to the iPhone 18 Pro lineup, users with other iPhone models running iOS 27 can also benefit from the update.
iOS 27.0.1 Release Notes at a Glance
Here’s a quick overview of what Apple has fixed:
| Issue | Affected devices | Fix in iOS 27.0.1 |
|---|---|---|
| Face ID authentication failure causing unexpected restart | iPhone 18 Pro and 18 Pro Max | Fixed |
| Color artifact in certain 2x photos at f/1.48 | iPhone 18 Pro and 18 Pro Max | Fixed |
| Touchscreen becoming unresponsive when opening Control Center and Notification Center | iPhones running iOS 27 | Fixed |
The update is therefore primarily about stability and bug fixes, rather than introducing new features.
How to Install iOS 27.0.1 on Your iPhone
If your iPhone supports iOS 27, you can install iOS 27.0.1 directly through the built-in Software Update system.
Follow these steps:
- Open the Settings app on your iPhone.
- Tap General.
- Select Software Update.
- Wait for iOS 27.0.1 to appear.
- Tap Update Now or the corresponding download and installation option.
- Enter your passcode if requested.
- Allow the iPhone to download and install the update.
Your iPhone will restart during the installation process.
It’s a good idea to connect your device to Wi-Fi and make sure it has sufficient battery power before starting the update. If the battery is low, connect the iPhone to a charger.
How Large Is the iOS 27.0.1 Update?
The download size depends on the iPhone model and the version of iOS currently installed.
For example, the update is approximately 788.5 MB on an iPhone 16 Pro in one installation scenario.
Your download may therefore be smaller or larger.
The actual space required during installation can also differ from the displayed download size because iOS may need additional temporary storage while preparing and installing the update.
If your iPhone is low on available storage, consider freeing up some space before starting the update.
Should You Install iOS 27.0.1?
For users already running iOS 27, this is a straightforward bug-fix update rather than a feature release.
The update is particularly relevant if you own an iPhone 18 Pro or iPhone 18 Pro Max and have experienced unexpected restarts following Face ID authentication failures or unusual color artifacts in 2x camera photos.
Other iPhone owners can also benefit from the touchscreen fix involving Control Center and Notification Center.
Since iOS 27.0.1 specifically targets bugs introduced or exposed in the first iOS 27 release, keeping the device updated is the simplest way to receive Apple’s fixes.
iPadOS 27.0.1 Is Also Available
Apple has also released iPadOS 27.0.1 for compatible iPad models.
The iPad update is separate from iOS 27.0.1, so iPad users should check Settings > General > Software Update on their device to see whether the update is available.
Final Thoughts
iOS 27.0.1 may be a small update, but it addresses several issues that could noticeably affect affected users.
For the iPhone 18 Pro and iPhone 18 Pro Max, Apple has fixed an unusual Face ID-related restart problem and a camera color artifact affecting certain 2x photos. For other iPhone models running iOS 27, the update addresses a touchscreen issue that could occur when accessing Control Center and Notification Center.
If you’re already running iOS 27, you can install the update from Settings > General > Software Update. The download size varies by device, but the update is relatively small compared with a full iOS release.
Apple has also rolled out iPadOS 27.0.1 for compatible iPads, making this a broader round of early bug fixes following the launch of its latest operating systems.
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