Why is iOS 13 not installing?

If iOS 13 is there in Software Update but your iPhone or iPad just won’t download it, or it seems to be hanging, follow these steps: Force quit the Setting App. Then reopen Settings and try downloading the software again. You’ll need to be connected to a WiFi network or the iOS 13 update will not download.

Why is my iOS Update not installing?

If you still can’t install the latest version of iOS or iPadOS, try downloading the update again: Go to Settings > General > [Device name] Storage. … Tap the update, then tap Delete Update. Go to Settings > General > Software Update and download the latest update.