Question :
For some reason, my Calendar.app is flooding with red warning messages like “Your iPhone is infected”, “Virus detected”, “Critical Warning”, “Your iPhone is in danger” etc.

Is this true ?
Where did this come from ?
How can I get rid of these ?

Answer :

It is not a virus infection. These are not real iOS Error Messages. These are Calendar Events. You have recently clicked on some unreliable internet link that has subscribed you to an external event calendar…

To get rid of these, do this :

• on your iPhone, open the Calendar.app
• in the window that opens you will see your current appointments, and in the bottom-bar three buttons : “Today”, “Calendars” and “Inbox”
• click on the “Calendars” button (bottom center)
• in the pull-up screen that appears, you will see all Calendar-feeds that you have active
• scroll down to the “Subscribed” chapter
• if you have just one entry there, click on the coloured circle in front of it to remove the white checkmark
• if you have more than one entry in the “Subscribed” chapter, click on the coloured circle in front of the top/first one to remove the white checkmark
• then, click “Done” (top-right) to see if the error messages are gone
• if they are, proceed – if not, redo the above step until the error messages have gone from your calendar
• when you see that the error messages have disappeared from the regular Calendar view, click on the “Calendars” button (bottom center) again
• then, in the pull-up screen that appears, scroll down to the “Subscribed” chapter again and click on the Info-button (encircled i-letter) that is at the right side of the name of the Calendar that you have previously unchecked (to make the error messages disappear)
• in the “Edit Calendar” page that opens, scroll down completely and click on “Delete Calendar” (in red – completely at the bottom)
• now, the pesky calendar subscription will be gone

That’s it !

enjoy 😉