I’m trying to upgrade my iOS system from 13.3.1 to 15.2.1 on IPhone SE (1st generation).
The phone downloads the update successfully, but when I press update now the system goes to Verifying Update and ends up with “Unable to instal update - An error occurred installing iOS 15.2.1” and options “Retry” and “Remind me later”.
iPhone 5s, iOS 10
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?
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?
Low Power Mode is On.
Turn it OFF and then you can perform the update.
Good to hear it worked 👍
Thanks for your feedback & you're welcome.
Didn’t help, unfortunately.
Freeing up the space helped!
Many thanks!
iOS upgrade to 15.2.1 SE (1gen).
