How to fix iPhone 8 error 4013 when updating

Asked 15-Oct-2018
Viewed 408 times

1 Answer


If there is insufficient storage space for an operating system upgrade, iPhones may experience update problems. To make sure this isn't the cause of your iPhone 8 problem 4013, consider deleting certain apps or transferring images, videos, and other non-system vital files to your computer or iCloud. After that, try updating your device again.

To manage your iPhone's storage, follow these steps:

  1. Select Settings.
  2. Select General.
  3. Tap iCloud Storage & Usage.
  4. Select Manage Storage.