iOS 15.6 recommended update
somewhat less than 3 gigabytes download.
numerous security fixes
update your browsers as well.
https://www.komando.com/security-privacy/browser-zero-day-flaws/847709/
= new reply since forum marked as read
I got two messages, one about the update and the other that storage is almost full.
Well, Evernote is the bad boy, using 15.63 GB of storage, though Apple reminds me constantly to move my photos to iCloud (which I refuse to do because they scan photos shared on icloud with an opaque algorithm)
Anyway, in the mix is iOS 15.6 at 1.72 GB ready to install.
Before I got wired internet here (DSL is still the only wired option) I was on cellular internet and these unstoppable downloads would eat up lots of my quota of data). You could prevent them only by constant vigilance (never leave data on while charging and so forth). Or by filling up memory so that the 1.72 or so GB would not fit.
Apple *hates* cellular data users, though I saw some mention of celluar data setting up a new iPad. After about a decade of fighting this war.
I'll move almost all the photos to a mac later today. The reason to keep them is to paste into emails and messages, and DU doesn't allow that, only links, so I can upload them from any old system any time. Most do require a little cropping or captioning or faking of some sort, of course.
I should use the phone less. The type and the keys seem to get smaller every day. 
Of course, if programmers actually TESTED software before releasing it, life would be a lot better.
Did people actually ASK for all these new and shiny features? Not really.
If you want to see EXCELLENT software, look at OpenBSD. It really is audited before releasing.
Probably the only code anywhere that is checked.
Cheers to the developers.