I can’t update to IOS 15.1 on my iPhone 11.

Use internet speed over 15 Mbps (both download and upload) speed for error free update. Avoid latching on to Hotspot or WiFi Extenders

VPN or proxy connections might prevent your device from contacting the update servers.

• Get help with over-the-air iOS updates - Apple Support

• Remove and download the iOS update again

If you still can't install the latest version of iOS, try downloading the update again:

1. Go to Settings > General > [Device name] Storage.

1. Find the iOS update in the list of apps.

1. Tap the iOS update, then tap Delete Update.

1. Go to Settings > General > Software Update and download the latest iOS update.

If you don’t see the update in the list of apps or if the issue happens again, you need to update your device with iTunes.

Try updating iOS after each step.

• Try Forget the WiFi network and add again

• Try another WiFi network 

• Toggle sets automatically off and then on

• Reset your network settings

• Force restart your device

• Remove any beta profiles, if applicable

• If everything fails: - Use iTunes or Finder (for MacOS Catalina+) to update your device instead of over-the-air

• Get help with iOS update and restore errors - Apple Support

• If you see an error when you update or restore your iPhone, iPad

I believe that, by Hard Reset, you meant Forced ReStart. Others who may need assistance can Try and Force Restart the iPhone EXACTLY as shown below and see whether that resolves the issue:

• Press and quickly release Volume UP button
• Press and quickly release Volume DOWN button
• Press and Hold the SIDE button until an Apple logo appears and then release the Side button (Can take up to 20 seconds. (DO NOT release Side Button when invited to Slide Power OFF). 

Axel F.

kate125 Said:

"I can’t update to IOS 15.1 on my iPhone 11.: When I try it says there is an error downloading. I have tried ensuring there is adequate storage and have hard reset 3 times. I’m on wifi and the phone is plugged in. I don’t have a pc to update with. Any ideas"

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Why the Error:

You are losing the connection or the downloaded file is corrupt. So, are you connected to a VPN? If so, disconnect from it.

Any Access to a Computer?:

Though you have no computer, ask someone else (i.e. friend or family member) if you may use their computer to perform this update.

Use a Computer and Ethernet:

Start with attempting an update through use of a computer. If you cannot use Wi-Fi, then use Ethernet.  Go Here: Update your iPhone Using a Computer - User Tip. On the computer, you would connect it through Ethernet, going directly into your router. For a Mac (or PC) that does not have Ethernet, this would be the adapter to use: Belkin USB-C to Gigabit Ethernet Adapter - Apple. If you get the same error, the model is likely just not compatible.

Hi Kathy,

What do you see on your screen when you attempt to update your iPhone 6s?

Make sure that your iPhone is setup to meet the following requirements before you attempt to update the iOS version-

• Your iPhone must have a fast Wi-Fi connection; you cannot update over cellular data or a cellular hotspot
• The iPhone can not be in Low Power mode
• The battery state of charge must be above 50%
• Your iPhone must have at least 6GB or more free storage space
• Your iPhone cannot be connected through VPN
• You should leave the phone plugged in until it finishes updating, both to assure that it remains above 50% and to keep Wi-Fi enabled (Wi-Fi turns off when the phone sleeps if not connected to power).

Axel F.

Mikaimee Said:

"[...]I am having the same issue, but even after removing a pile of apps and photos etc, it is showing me that more than half my space is taken up by software. I tried deleting the update, but it just doesn’t delete.[...]"

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Reporting this to Apple:

This is a well known bug. So report it to Apple, through use of feedback. In regards to deleting the update, note that iPhones cannot be downgraded after an update installation.

Provide your Feedback:

Do your Part: Inform Apple of your feedback. Apple wont get back to you directly, but the more feedback thy receive from its users, the more likely they will know what needs to be fixed.

1. Go Here: Feedback - macOS - Apple
2. Select: "Feature Request" for the "Feedback Type"
3. Select: "Application/Utilities" for the "Feedback Area"
4. Comment: on why this seems dumb, and how you think things should be a bit better 
5. Proceed from there as necessary.

I am having the same issue, but even after removing a pile of apps and photos etc, it is showing me that more than half my space is taken up by software. I tried deleting the update, but it just doesn’t delete.

it’s not just my phone, my husband’s is the same.

I have An iPhone 6S and I’ve been trying to get the 15.1 iOS update from 6 AM this morning and I intend to make sure that I have storage for it and my phone is plugged in and I’m connected to Wi-Fi and it’s still not working so I’m not really sure.

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I’ve the exact same issue every time I try to download it says error I tried everything

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Apple-supportfællesskaber

dasnk

IT WORKED! I've been trying for over a week to install this update to my iPhone 12 and this simple little process worked. Can't thank you enough!

In addition to the requirements that you have mentioned in your post:

1. Ensure that Low Power Mode is set to OFF
2. Ensure that VPN is set to OFF
3. Double Check the Wi-Fi Network and ensure that it is working
4. Ensure that your iPhone is charged at least 50%+
5. Ensure that you have at least 6GB available storage.

Axel F.