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I have an old iPhone 7 on iOS 12.0 and I want to use it as a backup. However it won't let me upgrade to the latest iOS 15. It just constantly says it can't verify the update.
I have tried going into storage, deleting the update and downloading it again but I get the same error
"Unable to Install Update" "An Error Occurred Installing (null)".
Any suggestions on how I get around this. Is it because you can't go from 12 to 15 in one go?
iPhone 7
Optimize the range of the mobile network, see this Apple article: If you see No Service or Searching on your iPhone or iPad
https://support.apple.com/en-us/HT201415
Check your Wi-Fi network, see this Apple article: Connect to Wi-Fi on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT202639
See also the following Apple articles:
Update your iPhone, iPad, or iPod touch
https://support.apple.com/en-in/HT204204
If your iPhone, iPad or iPod touch won’t update
Optimize the range of the mobile network, see this Apple article: If you see No Service or Searching on your iPhone or iPad
https://support.apple.com/en-us/HT201415
Check your Wi-Fi network, see this Apple article: Connect to Wi-Fi on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT202639
See also the following Apple articles:
Update your iPhone, iPad, or iPod touch
https://support.apple.com/en-in/HT204204
If your iPhone, iPad or iPod touch won’t update
Did you check also the device storage?
For the update you need about 6 GB device storage.
See this Apple articles below
If you need more space for an update on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT203097
How to check the storage on your iPhone, iPad and iPod touch
https://support.apple.com/en-gb/HT201656
Clear Other storage on your iPhone or iPad
https://support.apple.com/en-us/HT211686
What's the difference between device storage and iCloud storage?
Hi, thanks for this but unfortunately none of these seem to handle the issue I'm having.
I'm updating on Wifi (which is connected fine) and I can download the update from the server OK so there is no connectivity issue. The problem is then can't verify the downloaded update for some reason.
You do try also: If your iPhone, iPad or iPod touch won’t update
Yes thanks again. However I went through this and the issue I'm having doesn't come up in this.
Unable to upgrade iPhone 7 from iOS 12.0 to 15
