As we all know, Apple does well in securing the contents of iPhone by allowing syncing and backing up data from iPhone to iCloud. You just have to turn on "iCloud Backup" option, and then make backup by yourself or let it automatically being done by the device itself. The whole process is pretty easy and handy without advanced skills required. However, reported by iPhone users, an error with iCloud backup failed issue will occur sometimes. To troubleshoot it, we will get started sharing possible solutions in this post to help fix problem soon.

Part 1. Check iCloud Available Storage

It's probable that your iPhone backup failed due to there is no enough space in iCloud. In such situation, a message usually prompts that "You do not have enough space in iCloud to back up this iPhone". Therefore, you are advised to check "Settings" > "[Your Name]" > "iCloud" > "Manage Storage" > "iCloud Storage". If there is no sufficient available space, you might as well delete the unnecessary data, uninstall unused apps, upgrade your iCloud storage plan, etc. to make more room for backing up iPhone data.
iphone icloud storage

Part 2. Make Sure iPhone Is Connected to WIFI

Have you wondered why iCloud backup failed at times with a message showing that your last backup couldn't be completed? Fact is that a weak network connection will cause the failure of backing up iPhone data. Due to the big data size, you'd better not use cellular data to back up. Go for "Settings" > "WIFI" on your iPhone check whether the device is connected to WIFI or try to change another strong WIFI network.

connect iphone with wifi

Part 3. Connect iPhone to Power

As required, your iPhone has to connect to power when it is going to automatically back up data. Hence, to fix iPhone won't backup to iCloud, you are supposed to check the charging outlet to see if it works well without problem. Ensure that the charging symbol on your iPhone is on, the outlet can function or test the charging cable in your own way.
charge iphone

Part 4. Make Sure iPhone Screen Is Locked

It's well-known to us all that aside from power source and WIFI connection, your iPhone screen should be locked to proceed the automatic iCloud backup task. As a result, you ought to go to "Settings" - "Display & Brightness" - "Auto-Lock" to enable this option and set a time period. Or you can directly turn on screen passcode for your iPhone to make it locked when you don't use it.
iphone auto lock

Part 5. Sign Out of iCloud Account and Sign Back In

It seems like a fresh start to sign out of your iCloud account and sign back in. You can try to apply this method to fix potential software glitch. To do it, you just head to "Settings" > "[Your Name]" to scroll down and click "Sign Out". After that, press on "Sign In" option to log in iCloud account with Apple ID and password again.
icloud sign out and sign in

Part 6. Reset All Settings

Another practical way to fix iCloud backup failed is to reset all settings. By using it, you are able to erase and restore all preset settings to factory defaults, which can, to some degree, help to fix a software issue for iCloud backup failure. It's very simple to do. You just need to click "General" > "Reset" > "Reset All Settings". Afterward, your iPhone will shut down and you have to reconfigure the settings when it turns on.
reset all settings

Part 7. Check iCloud Backup System Status

There is another possibility that you might not think of will cause an iCloud backup to fail. That's Apple's iCloud backup system. Maybe an error happens with it and you are suggested to check whether "iCloud Backup" is available on the system support page. Suppose it's not available, you can check back later and then try again to back up when it's normal.

apple icloud backup system status

Part 8. Back Up with iTunes

When iCloud backup failed, there was a problem enabling iCloud backup or something else abnormal happens, you can choose to back up your iPhone data with iTunes. It's also viable and can be done within quick steps. Just connect your iPhone to the newest version of iTunes app on computer, press the device icon after recognition, click on "Summary" > "Backups" and select to automatically or manually backup.

backup iphone itunes

Part 9. Fix iPhone iCloud Backup Failed Issue with Joyoshare iPhone Data Recovery

If all aforementioned and introduced solutions are not useful, you may have to try to fix iCloud backup failed issue with a third-party tool, named Joyoshare iPhone Data Recovery. It offers ability to back up and recover data from your iPhone, iPad and iPod touch, or from iTunes or iCloud backups, to save on computer in professional way.

Key Features of Joyoshare iPhone Data Recovery:

Selectively or wholly extract data from iPhone to back up

Support more than 20 kinds of iOS data types

Allow previewing iOS files before backing up to computer

Compatible with the latest iOS 13 and all iDevice models

back up iphone data with joyoshare