However, that excitement can be spoiled if you don’t have enough room on your iPhone to upgrade.
You’re not without options.
That means you need at least as much free space on the phone as the size of the update.

If you don’t have adequate room, you’ve got the option to’t upgrade.
Once the update completes, it re-downloads that content so that you don’t lose anything.
In some cases, though, that process doesn’t work.
If that happens to you, delete data from your iPhone.
you could alsoremove apps that are built-in to your iPhone, but this doesn’t clear up any space.
It also lets you offload unused apps to hibernate them for more storage gains.