Calendar virus
Has anyone come across this virus in their calendar?
iPhone 12, iOS 14
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Yes, thousands of people have unknowingly subscribed to such spam.
If running iOS 13 or earlier versions, check: Settings - Passwords & Accounts - Accounts - Any rogue entries here? If so, delete the rogue account.
If running iOS 14, check: Settings - Calendar - Accounts - Any rogue entries here? If so, delete the rogue account.
The Apple support article is below.