Upgrading iCloud storage plan

Make sure you are doing as instructed in Upgrade to iCloud+ - Apple Support

Settings ➜ Your Name ➜ iCloud ➜ Manage iCloud ➜ Buy More Storage or Change Storage Plan or Upgrade to iCloud

If that isn't working, you will need to provide a lot more details about the issue.

dpcplantlady Said:

"Upgrading iCloud storage plan: I cannot upgrade my iCloud storage plan to iCloud+ on my iPhone."

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Successfully Updating iCloud Storage Plan:

Use a Computer:

Perform this using a computer, as it would be more user-friendly doing os.