If you see the update file, tap on it, then tap Delete Update. Scroll down the list of apps below the Storage Recommendations and look for an iOS update. Occasionally, an issue with the downloaded iOS update file will prevent you from installing it on your iPhone. While in Settings -> General -> iPhone Storage, check to see if the update has already downloaded. If you have more than 1 GB (gigabyte) available, then you have enough storage space to update your iPhone. At the top of the screen, you’ll see how much storage is available on your iPhone.To check how much space is available, do the following: (There are 1000 megabytes in 1 gigabyte, so that’s not a lot of space.)

iOS updates generally require 750–800 megabytes of free space before they can be installed. Next, check if your iPhone has enough room to store the update. Check out our other article if your iPhone is experiencing Wi-Fi issues. Make sure the switch next to Wi-Fi is on, and that a checkmark appears next to the name of your Wi-Fi network. We recommend using Wi-Fi instead of cellular data when downloading updates, as it’s faster and won’t eat into your data plan. Some updates, because they are so large, require a Wi-Fi connection. Your iPhone needs an internet connection to download new iOS updates. Make Sure Your iPhone Has An Internet Connection

Problems with new itunes update