Reasons Why Your iPhone Won't Back up to iCloud

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To let iCloud back up your iPhone automatically every day, please make sure the followings are true:

  1. You have turned on iCloud backup in Settings > Apple ID > iCloud > iCloud Backup.

  2. Your device has an active Wi-Fi network connection.

  3. Your device must be plugged into a power source.

  4. There is enough iCloud storage for the backup to complete.

  5. Your device's screen should be off.

If your iPhone fails to meet these requirements, it is unable to back up data to iCloud. And above all, no Wi-Fi connection and lack of iCloud storage are the two most common reasons why your iPhone won't back up to iCloud.

 

 Solutions to Fix iPhone Won't Back up to iCloud

When your iPhone is unable to back up data to iCloud, here is what you can do to fix it.

 

1. Check Wi-Fi Connection and iCloud Storage

First of all, you should make sure your iPhone has a strong Wi-Fi network connection, especially when you want it to back up automatically at night.

Then you should check the available iCloud storage of your account:

  • Tap Settings > Apple ID > iCloud > Storage and you'll see the available iCloud storage.

  • Go to Manage Storage > Backup. It will estimate the size of your next backup.

  • If there is not enough iCloud storage for the next backup, you can tap Delete Backup to make room for the new one or make a smaller backup by choosing less data to back up.

  • Otherwise, you need to purchase more iCloud storage: Settings > Apple ID > iCloud > Storage > Manage Storage > Change Storage Plan.

iCloud-Storage

2. Backup iPhone to iCloud Manually

This is helpful when you get the message saying "your last backup couldn't be completed" or your iPhone won't back up to iCloud automatically.

  • Open Settings app on your iPhone;  

  • If you are using iOS 10.2 or latter, tap Apple ID > iCloud > iCloud Backup > Back Up Now;

  • If your iPhone is running on iOS 10.1 or earlier, tap iCloud > Backup > Back Up Now.

Back up to iCloud Manually

 

3. Sign Out and Back to iCloud

This is useful when there is a problem enabling iCloud backup because of account verification issues. To log out and log in iCloud account:

  • Open Settings on iPhone.

  • For devices on iOS 10.2 or above, tap Apple ID and scroll down to tap Sign Out.

  • On iOS 10.1 or earlier, choose iCloud and tap Sign Out.

  • You'll be asked to erase all settings. Confirm it and you'll be log out of iCloud account.

Now sign in your iCloud account with your Apple ID and password. You can then check if the iPhone can be backed up to iCloud.

4. Reset All Settings on iPhone

Resetting all settings on iPhone will only erase system settings like Wi-Fi network passwords, etc. So you should not worry about files on your iPhone.

  • Go to Settings > General.

  • Scroll down and choose Reset.

  • Tap Reset All Settings.

  • You'll need to enter passcode and confirm your selection.

  • After the resetting, you can try to back up your iPhone to iCloud again.

Reset iPhone