Got a suspicious call
Wondering if there is a problem with my iCloud account because I got a call saying my security was breached
iPhone 11 Pro Max, iOS 13
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You are wise to be suspicious.
Apple does not make such calls.
All such calls are scams from criminals attempting to steal your personal and financial information. The callers will often use number spoofing to pretend they are calling from a legitimate business. The correct course of action is to hang up on them, repeatedly if needed.
Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support