iOS 15.7 Update Failed

To update over the air from the phone all of these requirements must be met:

• You need at least 6 GB of free storage
• You must be connected to a Wi-Fi network (and not a personal hotspot) unless it is an iPhone 12 or 13 series or an SE 3rd edition with an active 5G network connection
• The phone must be charged to at least 50%, and preferably plugged in so it stays above 50% during the update
• The phone must not be in Low Power Mode
• The phone must not be connected through VPN, and it may be necessary to delete any VPN apps and VPN profiles
• The phone cannot be in Airplane mode
• You cannot still have a beta version installed on the phone
• You cannot have a previous version that was downloaded, but not installed - go to Settings/General/iPhone Storage to look; if you find an iOS installer, delete it

If you can't meet all of them you can still update using your computer.

Read my post on this page

ianzki17 wrote:

Hello im having the same problem where did you update the your ios in wifi or pc? I got the same error everytime i update the ios. Thanks

https://discussions.apple.com/content/attachment/67b6c600-31d4-41e7-8d0c-adfdefd5db6f

May conclude that most probably is due to insufficient Storage.

Some say the 5GB, 6GB or 7GB required for the update to be installed successfully.

For my case, 8GB got failure too! At the end, succeeded with 10GB++ free storage😅🤷🏻‍♂️

My guess the issue might be either

1. v15.7’s storage requirement is case by case, or
2. iPhone Storage inaccurate info

You don’t need any special software to connect your iPhone to your Mac; it’s there already on your Mac in Finder. Here are the details→Use the Finder to sync your iPhone, iPad, or iPod with your computer - Apple Support

See comments attached to If you see "Software update is required t… - Apple Community . The reason this IOS update was important to me is the hope that it will resolve the problem with this software installation that is blocking me and others from being able to connect to our Mac via USB. That's another thread though, not this one. Now that I have upgraded IOS, I will try the USB again. Thanks.

vtskier27 wrote:

The update in only 379.3 mb. How much free space is needed on my iPhone 12? In a previous post it said 6gb is needed. That’s crazy! Amy suggestions. Thanks

1. The update INSTALLER is only 379.3MB. However, to install that update the installer makes a complete copy of the current iOS version, then uncompresses the update, applies the update to the copy it has made, verifies the copy, then deletes the current iOS version and replaces it with the updated iOS version. It does it this way so if the update doesn’t “take” correctly the iPhone still has a working version of iOS that it can fall back to. So it needs enough free storage to hold 2 full copies of iOS during the update process.

What are your symptoms? What is the specific message when it fails? Have you checked all of these?

To update over the air from the phone all of these requirements must be met:

• You need at least 10 GB of free storage for iOS 16 or 6 GB for iOS 15 or lower; more is better
• You must be connected to a Wi-Fi network (and not a personal hotspot) unless it is an iPhone that supports cellular 5G (12, 13, 14 or SE 3rd edition) and has a 5G network connection
• The phone must be charged to at least 50%, and preferably plugged in so it stays above 50% during the update
• The phone must not be in Low Power Mode
• The phone must not be connected through VPN, and it may be necessary to delete any VPN apps and VPN profiles
• The phone cannot be in Airplane mode and must have a cellular data connection
• You cannot still have a beta version installed on the phone
• You cannot have a previous version that was downloaded, but not installed - go to Settings/General/iPhone Storage to look; if you find an iOS installer, delete it

If you can't meet all of them you can still update using your computer.

Are you trying to download the update onto your computer, or are you updating, using Wi-Fi?

Any error message given?

Due to the increased traffic on Apple Servers, you might get a network error message, related to the slow download speed.

I'm getting the same: "Software Update Failed" - "An error occurred downloading iOS 15.7". iPhone 12 with latest iOS installed (15.6.1) on both data and Wi-Fi.

I have double checked and I cover all the above points, but still get the error.

Quesiton - if I upgrade to the new iOS16, are all the iOS15.7 updates included?

I'm reluctant to upgrade to upgrade due to the usual bugs in the first major upgrade, so my preference is still to get 15.7.

Despite some saying 5, 6, 7 GB free I freed up 10GB and had success. 15.7 seems to do a poor job of reporting the reason for the error when it does its memory check. Apple used to "just work", but now that seems to be less of a thing and seems more so every day!!!

I meet all those requirements, but am still getting the error on IOS 15.6.1 on an iPhone SE Gen 3 connecting to OS X Catalina 10.15.7, downloading over WIFI. Have tried 10 times over the span of the last month, all same results.

I am getting the error and I'm good on everything except that I can see a software update (the error one from today) in my storage and when I hit delete update it will not delete the update. I almost feel like they are trying to force me to upgrade and I don't have the money for that right now.

i've tried everything and Apple will not let me install the software update on my Xs.

No, you don't have to upgrade your phone (at least I don't think so). What you should do if there is no other way to delete this kind of baggage, then you can always get rid of it by rebuilding your phone. Make sure you have backed everything up, then completely erase your phone, which will install a clean install of the latest version your phone supports. You will be asked whether to restore your data and you should select yes. I've done this in exactly your situation on and iPhone 6 & 7, as well as my Watch with good results. Lots of articles and videos here and elsewhere. When you are done, you should have a clean install with all your data and apps restored, but you should find this failed update you seem to have has not been restored and then should be able to proceed. BTW, I fixed my problem, but I had to have 10Gb free before it worked for me on and SE Gen 3.

bee61 wrote:

No, you don't have to upgrade your phone (at least I don't think so).

You don’t have to update your phone if you don’t mind your phone being susceptible to being hacked. iOS updates, in addition to adding features, also fix vulnerabilities. As a minimum you need 12.7.1 to be secure.