If your iPhone won’t backup to iCloud, you’re not alone. Many people have reported this issue. There are a few possible explanations, and a few possible solutions.
One possible explanation is that you don’t have enough iCloudstorage space. iCloudstorage is limited, and if you’ve been using your iCloudstorage for other purposes, you may not have enough space left to back up your iPhone. You can check how much iCloudstorage you have left by going to Settings iCloudStorage.
If you …