iOS update
Every time I go to update my phone to iOS 15 it says unable to check for update it’s been going on for months and nothing has changed
iPhone XR, iOS 14
The first (and simplest) thing to try if something isn’t working right is to restart your iPhone:
Restart your iPhone - Apple Support
If that doesn't help, see:
If you can't update or restore your iPhone or iPod touch - Apple Support
