Why iPhone won’t update iOS 16/15?
Apple keeps releasing new iOS versions to add more features on iPhone and make iPhone more stable. But sometimes, some users reported that they can't update their iPhone to the latest iOS version. For example, the process just stuck in the middle, or an iPhone fails to download the package, and so on.
There are various causes making an iPhone unable to update, The most common reasons include weak network conditions, not enough space on iPhone, the iOS package is corrupted, etc. If you encounter this issue, don't worry, just follow the next part, we summarize some solutions and guide you on how to fix this problem in detail.
How to fix iPhone won’t update to iOS 16/15?
Before we trying to fix this issue, please make sure the “Automatic Updates” option is enabled. Go to “Settings” > “General” > Toggle on the “Software Update” option.
In addition, please backup the iPhone in case any unexpected issue because of incorrect operation.
Method 1. Check Network and battery level
iOS update can take dozens of minutes, so it needs a stable and strong Internet connection and at least 50% of battery level to download and install the iOS 16/15/15.5. So, we suggest you perform this process at home because usually the updating won't be interrupted by weak network/Wi-Fi or low battery level.
Please connect your iPhone with a charger if the battery level is low. And you can connect a Wi-Fi to make sure the network conditions, you can just go to the “Settings” app > tap “Wi-Fi” > Choose a trusted and powerful Wi-Fi.
Method 2. Free space on the iPhone
If your iPhone is running out of space, it can't download iOS update files. Although iOS 16 and iOS 15 come in size with around 2 GB to 3 GB. But you will need to make sure at least 6GB of available space to complete the installing and guarantee stable running.
In this case, you can go to “Settings” > “General” > “iPhone Storage” to see how much available space is on your iPhone, and delete some apps.
Then you can tap an app that takes up large space on your iPhone, and delete it. If you want to keeps the app, just back to the Home screen and run this app, and go settings of it, usually you can clear the cookies or history there.
Some users might have a large number of media files, like photos, videos, you can go “Photos” app to delete some of them. And if you don’t want to lose them, you can transfer photos from iPhone to a computer.
Method 3. Update iPhone via iTunes
iTunes can be an alternative tool when your iPhone fails to update. When iTunes detects your iPhone on a PC, it will receive a notification to update iPhone. Just follow the guide below:
1. Download and install iTunes. And connect iPhone to a computer with a USB cable.
2. Click the phone-like icon to enter the “Summary” tab.
3. Click “Update”. The package for upgrading iPhone would be saved to the computer and you could decide when to upgrade iPhone.
Method 4. Redownload the iOS package
If the downloading process was interrupted for some reason, you may have a corrupted package. The iPhone would tell “Unable to Check for Update” or “Unable to Verify Update”, you can delete the iOS package and redownload it to fix the iPhone won't update problem.
To delete the iOS package just go to "Settings" > "General" > "Storage".
Download the package: iPhone "Settings" > "General" > "Software Update".
Additional content: Protect iPhone data before updating iPhone
Before upgrading iPhone, you should save iPhone data to a safe place to avoid any damage to your data. Although new iOS could fix some problems in the previous version, it also brings new problems. For example, some users reported that they lost photos after upgrading iOS.
You could use AOMEI MBackupper to quickly save iPhone data. It is a free professional iPhone backup software. You could use it to backup iPhone contacts, messages, music, and videos to computer in seconds.
3 Steps to save what you want to computer
Step 1. Download AOMEI MBackupper. Connect iPhone to computer with USB cable and tap “Trust” on it.
Step 2. Click “Custom Backup”. Click an icon to select what you want and click “OK” to return.
Step 3. Click "Start Backup to" start the process.
Note: You can also choose "Full Backup" on the main interface to completely backup your iPhone.
Hope the post can help you out of the "iPhone won't update" issue. You can check your network, update with iTunes, free up some space, and redownload the installing package to solve iPhone 7, 8, X, 11, 12, 13 unable to update iOS 16, 15. And remember to save photos and other data in a safe place.
If you are using really old model, please check the supported models of the iOS version. For instance, iOS 16/15 is not compatible with models older than iPhone 6S.
FoneTool Runs Perfectly on
- iOS 16/15/14/13/12/11 and former
- iPadOS 16/15/14/13/12/11 and former
- iPhone 14/14 Pro (Max), 13/13 mini/Pro (Max), iPhone 12/12 mini/Pro (Max), iPhone 11/11 Pro (Max)
- iPhone X/XR/XS/XS Max, iPhone 8/8 Plus, iPhone 7/7 Plus, iPhone 6/6s/6s Plus
- iPhone SE (1st, 2nd, 3rd generations)
- iPod touch 1/2/3/4/5/6/7
- All models of iPad Air, iPad mini, iPad Pro and iPad