I connected my iPhone to transfer some ebooks to it. I was informed the firmware can be updated to 17.4.1 which I found a bit strange since I had updated my iPhone to 17.4.1 when it became available. Looking around the Internet, I found a couple of sites that mentioned this update. See
Apple released a new version of iOS 17.4.1, but no one knows what changed as an example. My iPad does not seem to be receiving a similar update.