iPhone Error: “Unable to Complete Cellular Plan Change”

Encountering this message during setup?

“Unable to Complete Cellular Plan Change — Your cellular plan could not be set up. Try again later.”

Here’s why it might be happening:

• The eSIM is already installed: You might be trying to re-add an active plan. Check your existing ICCIDs to confirm.
• You’ve reached the eSIM limit: Some iPhones can store only 5–10 eSIMs. Remove an old plan before installing a new one.
• Weak connection: A spotty internet connection might block activation. Try again on a stable network.

Updated on: 12/06/2025