The iOS 11.3.1 update is a small maintenance upgrade for iPhone, iPad, and iPod touch and it should take you less than 10 minutes to get it on board your device.
The newest version of iOS 11 delivers a short list of changes including a bug fix for iPhone 8 and new security patches.
If you’re upgrading from iOS 11.3, iOS 11.3.1 is a rather tiny download for iPhone X users, just 49MB. It’s around the same size for other iPhone models and Apple’s iPad tablet line.
If you’re upgrading from an older version of iOS, your iOS 11.3.1 update will be much bigger thanks to the features and fixes from updates you skipped. They’re baked into your version of iOS 11.3.1.
While some of you might want to temporarily hit pause on a iOS 11.3.1 download, others are perfectly fine upgrading from iOS 11.3 (or whatever you’re currently running) to iOS 11.3.1.
If you do decide to download iOS 11.3.1 onto your device, you’ll want to set aside some quiet time to complete the download and installation. Making the transition from one version of iOS to another can cause problems so you’ll want to minimize potential distractions.
We can’t tell you exactly how long your iOS 11.3.1 will take because download times always vary from person-to-person, device-to-device. That said, we can help you approximate how much time to set aside if and when you decide to download the iOS 11.3.1 update onto your device.
If you’ve prepared for iOS 11.3.1 and you’re connected to a fast Wi-Fi network, moving to iOS 11.3.1 could take just a few minutes to complete. If you haven’t done any prep work, the process could take longer.
|Sync (Optional)||5-45 Minutes|
|Backup and Transfer (Optional)||1-30 Minutes|
|iOS 11.3.1 Download||30 Seconds to 10 Minutes|
|iOS 11.3.1 Update||3-15 Minutes|
|Total iOS 11.3.1 Update Time||5 Minutes to 1 Hour|
Before you start your iOS 11.3.1 download it’s important to prepare. A little prep work ahead of the installation can go a long way toward preventing issues.
If you don’t know where to start you’re in luck because we’ve put together a guide that will take you step-by-step through the process we take before we install iOS updates on our devices. We used this very process before we installed iOS 11.3.1 on our iPhones and iPads.
Most of you will be able to complete these steps in a matter of minutes, but everything depends on your skill level and the state of your device.
If you haven’t backed up your files, checked in with your company’s IT department, or researched the changes on board iOS 11.3.1 update, the pre-installation process could take you 20 minutes or more.
You don’t need to follow every step in our guide, but make sure you backup your most important files. You’ll want to keep those safe as you move from your current version of iOS to iOS 11.3.1.
iOS 11.3.1 Download Time
Once you’ve prepared yourself and your device it’s time to initiate your iOS 11.3.1 download.
The exact iOS 11.3.1 download size will, again, depend on your device and your version of iOS. The download time will also depend on your connection speed.
If you’re moving up from Apple’s iOS 11.3 update, your iOS 11.3.1 update should be just a few megabytes. If you’re using a fast Wi-Fi connection is should only take a couple of seconds to download. If your Wi-Fi connection is slow, it will take longer.
If you’re coming from an older version of iOS, your iOS 11.3.1 download will be much larger, possibly several hundred megabytes or more, thanks to the updates you missed along the way. This will obviously increase the download time.
iOS 11.3.1 Installation Time
Once the download is complete, iOS 11.3.1 will start installing to your iPhone, iPad, or iPod touch. This process will take longer than the download.
If you’re upgrading from iOS 11.3, the iOS 11.3.1 installation could take anywhere from three to eight minutes to complete. It took about three minutes on our iPhone X.
If you’re coming from something older than iOS 11.2.6, your installation could take a lot longer. Those of you moving from iOS 10 to iOS 11 for the first time are looking at the longest installation time.
Your phone or tablet might reboot itself once or twice as the installation process starts finishing up so don’t be alarmed. This is normal.
After the iOS 11.3.1 update finishes up, you might need to spend time setting up Apple Pay and/or logging into iCloud and your device’s various apps and services.
You’ll want to spend some time checking your important data (photos, music, etc) to ensure everything is still there. We also recommend testing your core apps and services to make sure they’re working normally.
You’ll also want to hunt for bugs and monitor your device’s performance (battery life, Wi-Fi and Bluetooth connectivity, etc). iOS updates aren’t supposed to wreck your device’s performance, but we hear horror stories after every iOS release.
If you do run into a problem with iOS 11.3.1, take a look at our list of fixes for common iOS 11 problems. You might find a remedy for your issue there.
Apple’s next iOS 11 update could be iOS 11.4, another milestone update for the iPhone, iPad, and iPod touch. The company hasn’t confirmed a release date, the update is currently in beta, but it’s likely several weeks away.
Install iOS 11.3.1 for Better Security
Apple's iOS 11.3.1 update comes with four known security patches for all iPhone, iPad, and iPod touch models capable of running iOS 11.
If you skipped iOS 11.3, your iOS 11.3.1 update comes with 27 additional patches for potential exploits. Those of you lingering on iOS 11.2.6 would be wise to make the move sooner rather than later.
If you missed iOS 11.3, your iOS 11.3.1 update also includes a new privacy feature. When an Apple feature wants to use your personal information, an icon now appears with a link to access detailed information about how your data will be used and protected.
If you're running iOS 11.2.5 or older, you're exposed to an issue that lets people send a specific character that will crash an iOS-powered device and block access to the Messages app. It can also block apps like Facebook Messenger, Gmail, Outlook, and WhatsApp.
The iOS 11.2.6 update's main purpose was to patch up this issue. If you skipped iOS 11.2.6, you'll get these enhancements with iOS 11.3.1.
If you're running iOS 11.2.2 or below and receive a certain GitHub link through your Messages app, your iPhone or iPad can lockup or respring. The Messages app will also become unusable.
If you're on iOS 11.2.1, your iOS 11.3.1 update includes security improvements to Safari and WebKit to mitigate the effects of Spectre. If you're running an older version of iOS, your iOS 11.3.1 update will come with a lot more.
Apple's iOS 11.2 update fixed several problems, but it also brought problems of its own including a potentially nasty zero-day iOS HomeKit vulnerability.
The vulnerability, discovered by Tian Zhang, allowed for unauthorized control of HomeKit accessories including garage door openers and smart locks.
Apple quickly rolled out a server-side fix, but the company restored full functionality with the release of iOS 11.2.1. If you skipped iOS 11.2.1 and use HomeKit, you should download iOS 11.3.
If you skipped iOS 11.2, you'll get a few more patches with your iOS 11.3.1 update. Apple's iOS 11.2 update delivered 11 patches including one for Mail and one for Wi-Fi.
The iOS 11.2 and iOS 11.2.1 updates also patched up a widespread security issue called "Meltdown." Apple says its analysis suggests it "has the most potential to be exploited."
Meltdown affects all iOS 11 powered devices so we highly recommend downloading iOS 11.3.1 if you skipped iOS 11.2.
If you skipped iOS 11.1.2, iOS 11.1.1, and iOS 11.1, you'll get additional patches with your iOS 11.3.1 update.
The iOS 11.1 update delivered eight security patches including a fix for a serious Wi-Fi vulnerability called KRACK or Key Reinstallation Attack. KRACK is an exploit that targets the common WPA2 encryption protocol.
If you're just now making to move from iOS 10 (or whatever you're on) to iOS 11, your iOS 11.3.1 update will come with even more security features.
In iOS 11 you can't establish trust with a PC using fingerprints alone. You'll also need to put in a full passcode in order to gain that trust.
If you skipped older versions of iOS, your iOS 11.3.1 update will come with an even longer list of security patches.
Apple's iOS 10.3.3 update delivered 24 security patches addressing potential issues with Contacts, Messages, Notifications, and Safari. It also included a patch for a potentially dangerous Wi-Fi exploit called "Broadpwn."
If you skipped iOS 10.3.2 you'll get 23 additional patches with iOS 11.3.1. And if for some reason you missed iOS 10.3, you'll get 60 security patches with your iOS 11.3.1 update.
If you want to protect the data you store on your iPhone, iPad, or iPod touch, you should make your move to iOS 11 and iOS 11.3.1 soon.
This is particularly important for those of you running older versions of iOS.