Always wait until your iOS device asks you to update, don’t force it on day one because of problems such as this.

Owch…

I updated my iPhone 15 and 2018 mini just fine. Favourite features so far:

-Coloured dots in the calendar!

-RCS stopping that annoying “<person> liked <entire message you just sent>” text message

-iPhone mirroring on my Mac is pretty neat

And like with Microsoft products, ALWAYS wait untill at least the .1 release.