How long does the iOS 15.4.1 update take

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Apple’s iOS 15.4.1 update is a minor upgrade, but it can take quite some time to install on your iPhone.

The company has released a new iOS 15.4.1 update and the software brings a short list of changes for iPhone users. The update has no new features, but does have a number of essential fixes on board.

Moving your iPhone from iOS 15.4 to iOS 15.4.1 will give you the shortest list of changes and smallest download size. To give you an idea, the iOS 15.4.1 update is about 300MB for iPhone 12 Pro users who are upgrading from iOS 15.4.

If you’re upgrading from an older version of iOS, your iOS 15.4.1 download may be even bigger because the changes from the update(s) you skipped are baked in.

While some of you may want to skip downloading iOS 15.4.1 for now, most people should install the software now or in the near future.

If you decide to install iOS 15.4.1 on your iPhone, you’ll need to set aside some time to properly install the upgrade on your device.

Moving a device from one version of iOS to another often causes problems, so you’ll want to check your phone’s download, installation, and performance once the installation is complete.

We can’t tell you exactly how long the process will take as it can vary. That said, we can help you estimate how much time you should set aside if you choose to install the new software on your iPhone.

Task Time
Sync (optional) 5-45 minutes
Backup and transfer (optional) 1-30 minutes
Download iOS 15.4.1 5 minutes to 15 minutes
iOS 15.4.1 Installation 7 minutes to 12 minutes
Total update time iOS 15.4.1 12 minutes to 1 hour+


Before starting the iOS 15.4.1 download, make sure you are prepared.

If you don’t know how to properly prepare for an iOS upgrade, check out our pre-installation guide. It will guide you through the most important steps to take before starting the installation process.

You should be able to go through these steps in 30 minutes, but it all depends on your skill level and the current state of your iPhone.

If you haven’t backed up your data in a while, or if you’re unfamiliar with iOS 15.4.1’s changes, the pre-installation process may take longer.

You don’t have to follow every step in the guide, but you at least want to make sure that your phone’s data is backed up properly.

Data loss issues are quite rare, but if you are storing sensitive data (photos, videos, etc.) on your device, it is always better to be careful.

Download iOS 15.4.1

Once you’ve prepared, it’s time to start the download process.

Again, the exact size of your iOS 15.4.1 download will depend on your iPhone model and the version of iOS currently running.

If you’re running the latest version of iOS 15, you’ll see the smallest download size again. If you are using an older version, your download may be larger.

If you’re using a fast Wi-Fi network, the download should complete in less than 10 minutes. If your connection is slower or if you download during peak times, you may be looking at 10 minutes or more.

iOS 15.4.1 Installation

Once your device has finished fetching iOS 15.4.1 from Apple’s servers, the installation process will begin. This may take longer than the download.

If you’re upgrading from iOS 15.4, it will take about 10 minutes for the iOS 15.4.1 installation to complete. It took about seven minutes to install on an iPhone 12 Pro previously running iOS 15.4.

Your iPhone may reboot itself a few times during the installation process, but this is completely normal. Your device should boot normally once the installation process is complete.

Post installation

After the installation is complete, you may need to spend time logging into your iCloud account, logging into your device’s various apps and services, and/or setting up Apple Pay.

You may also want to spend some time checking your important data (photos, music, etc.) to make sure everything is transferring correctly.

After you’ve done that, make sure to test your core applications and services to make sure they work normally. New iOS software can cause apps to go haywire.

If you notice a problem with one or more of your apps, try downloading the latest version. Developers are still rolling out iOS 15 support updates.

You’ll also want to poke around your phone for bugs and performance issues. If you notice anything, check out our list of solutions for common iOS 15 problems.

4 reasons not to install iOS 15.4.1 and 11 reasons why you should

Install iOS 15.4.1 for better security

Install iOS 15.4.1 for better security

If security is important to you, then you should definitely consider installing Apple’s iOS 15.4.1 update right away.

iOS 15.4.1 has one new security patch on board and you can read more about it on Apple’s website† It helps protect your phone from damage.

If you missed the iOS 15.4 update, it had a whopping 36 new security patches on board. To learn more about these patches, visit: Apple’s security site for the details

If you missed iOS 15.3.1, it had one security patch on board. For more information, visit Apple’s security page

If you missed iOS 15.3, you will also get the corresponding patches with your upgrade. iOS 15.3 brought 10 new security patches for iPhone users. If you are interested in the details, you can read more about it here

If you missed iOS 15.2.1, you will get the security patch with your upgrade. More information about the switch can be found at Apple’s website

If you missed Apple’s iOS 15.2 update, you’ll get the 30+ security patches with your upgrade. You can read all about it on the company security site

iOS 15.2 also included some significant privacy upgrades. The software brought the company’s app privacy report to Settings. This lets you see how many times your apps accessed your location, photos, camera, microphone, contacts, and more in the past seven days. You can also see their network activity.

In addition, iOS 15.2 . brought Apple’s communications security features for children. You’ll find these features in the Messages app, Siri, Spotlight, and Search.

If you missed iOS 15.1, iOS 15.4.1 will bring the security patches to your iPhone. You can read more about it at Apple’s website

If you missed iOS 15.0.2, you will also get the security patch with your upgrade. You can learn more about it here

iOS 15.0 also brought numerous security patches to your iPhone. If you’re moving from iOS 14 and you’re interested in the exact nature of these improvements, you can read more about them at Apple’s security website

Apple has updated its website with new information about iOS 15’s suite of security patches. The company now says the software has fixed an issue that could have exposed a user’s personal Apple ID information and in-app search history. It also states that iOS 15 has fixed an issue that allowed apps to ignore privacy preferences.

If you skipped iOS 14.8 or an older version of iOS, you will also receive the security patches from those updates with your iOS 15.4.1 update.

In addition to these patches, iOS 15 comes with some security and privacy upgrades, including improvements to Siri. Requests to Siri are now processed on the device itself with Neural Engine. This makes it safer.

If you are an Apple Card user, you now get a security code that changes regularly to use when making online transactions.

Apple has also added a built-in authenticator similar to Google Authenticator. Allows you to generate verification codes for enhanced login security under your passwords.

There is also a Mail feature that hides your IP address.

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